The Abstruct of Hydroxyatrazine

Hydroxyatrazine Alias: 2-hydroxyl-4-(ph)-6-(isopropylamino)-S-three polybenzoxazines, hydroxydechloroatrazine, 4-(ph)-2-hydroxyl-6-(isopropylamino selectiely rebind triazines was high price to buy.
Formula: C8H15N5O
Molecular weight: 197.24 Dalton
A single isotope molecular weight: 197.1276601296 Dalton
IUPAC Name: 4-ethylamino-6-(propan-2-ylamino)-5H-1,3,5-triazin-2-one
Canonical SMILES: CCNC1=NC(=O)N=C(N1)NC(C)C
InChI: InChI=1/C8H15N5O/c1-4-9-6-11-7(10-5(2)3)13-8(14)12-6/h5H,4H2,1-3H3,(H3,
9,10,11,12,13,14)/f/h9-11H
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The Use of Hydroxyatrazine

Hydroxyatrazine Alias: 2-hydroxyl-4-(ph)-6-(isopropylamino)-S-three polybenzoxazines, hydroxydechloroatrazine, 4-(ph)-2-hydroxyl-6-(isopropylamino selectiely rebind triazines was high price to buy.
Formula: C8H15N5O
Molecular weight: 197.24 Dalton
A single isotope molecular weight: 197.1276601296 Dalton
IUPAC Name: 4-ethylamino-6-(propan-2-ylamino)-5H-1,3,5-triazin-2-one
Canonical SMILES: CCNC1=NC(=O)N=C(N1)NC(C)C
InChI: InChI=1/C8H15N5O/c1-4-9-6-11-7(10-5(2)3)13-8(14)12-6/h5H,4H2,1-3H3,(H3,
9,10,11,12,13,14)/f/h9-11H
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What is Azoxymethane

Azoxymethane is colon cancer's mouse and the big mouse's derivative, widely uses in exploring the prevention cancer's material and the material preparation colon cancer model cancer pathogenesis research. In addition, the anxiety which increases with the colon cancer, a antioncogenic material warmer discussion, takes role which this product acts. This product's mean dose is 15 milligrams/kilograms (body weight) approximately 3 week and the recessus stove (ACF) manages, once a week hypodermic injection several weeks later discovered. Azoxymethane (AOM) is one kind of strong effect carcinogen, uses in inducing the big mouse and the mouse colon cancer. 2,3 Azoxymethane induces carcinogenesis.1 the azoxymethane preventive treatment appraisal curative effect the research, and already in use, also often uses for to judge between other people's chemopreventative result, specially food, like undigestable sugars4,5, red meat6 and green tea7 in rodent model. These rodent model's result is helpful to the recognition possible precautionary approach, by human colon cancer.8 transformation growth factor Beta (TGF-β) the change or the unusual signal are developing and the AOM.9 treatment mouse's tumor examination, 10 azoxymethane treatment epidermis growth factor acceptor tyrosine activating enzyme activates intrinsic simultaneously stimulates synthesizes TGF- the alpha.11 epoxy synthase 2 (COX- 2) inhibitor NS - 398 (product to number N194) azoxymethane.12 to treat the big mouse cancer pre-cell's disease incidence rate to reduce.

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The Use of 4-Chloroindole-3-acetic acid

 

4-Chloroindole-3-acetic acid (4-Cl-IAA) is a potent auxin in various auxin bioassays. Researchers have used 4-Cl-IAA as well as other halogenated auxins in biological assays to understand the structural features of auxins required to induce auxin mediated growth in plants. 4-Cl-IAA is a naturally occurring auxin in plants from the Vicieae tribe of the Fabaceae family; and 4-Cl-IAA has also been identified in one species outside the Vicieae tribe, Pinus sylvestris. The apparent function of the unique auxin 4-Cl-IAA in normal plant growth and development will be discussed with a focus on Pisum sativum and Vicia faba.

4-Chloroindole-3-acetic acid (4-Cl-IAA) and indole-3-aldehyde (IAId) have been characterized as endogenous constituents in seeds of Pinus sylvestris L. by gas chromatography-mass spectrometry. Quantitative estimates indicate that immature seeds contained 640 pg 4-Cl-IAA (g fresh weight)-1 while mature seeds contained 340 pg (g dry weight)-1. 4-Cl-IAA could not be detected in seeds five days after germination. The content of IAld increased from 127 pg (g dry weight)-1 in mature seeds to 315 pg (g dry weight)-1 after five days of germination.

Auxins are a class of plant growth hormones naturally present in all plants. They have been implicated  in many processes of plant growth and development including stem elongation, root initiation, ethylene biosynthesis, and tissue vascularization . Auxins occurring naturally in plants include indole-3-acetic acid (IAA; Figure 1a), indole-3-butyric acid, phenylacetic acid (a weak auxin) and 4-chloroindole-3-acetic acid. The review will discuss the occurrence and activity of 4-Cl-IAA in plant tissues. A review by Engvild is recommended for other related discussions and references on halogenated auxins beyond the scope of this review.

4-Cl-IAA is a potent auxin generally showing more activity than IAA in standard biological assays. 4-Cl-IAA has been tested in many different bioassays and has been reported to be 1.3 to 50 times more activethan IAA (relative activity equals the concentration of IAA giving half maximal response divided by the concentration of 4-Cl-IAA giving the same response). Stimulation of growth of excised tissues is the standard biological assay for auxins including 4-Cl-IAA and IAA (4-Cl-IAA examples: pea stem split curvature growth, pea stem straight growth,oat and wheat coleoptile growth, and mung bean hypocotyl growth . 4-Cl-IAA treatment also increases root initiation and ethylene evolution in pea shoot cuttings . Reports on 4-Cl-IAA’s effects on the growth of intact plant organs include wheat and cucumber root inhibition, tomato epinasty, tomato parthenocarpy, mung bean growth inhibition and root initiation, and pea pericarp growth .

4-Cl-IAA ismore biologically active than IAAin these assays; however, Stenlid and Engvild  reported that wheat roots were inhibitedmore by IAA treatment than 4-Cl-IAA.4-Cl-IAA’s strong auxin activity has been postulated to occur via reduced metabolism of 4-Cl-IAA,or a receptor and signal transduction pathway unique frond production, IAA and 4-Cl-IAA at 10 _M were only weakly inhibitory. Of the halogenated auxins tested, 5-Br-IAA was proposed for mutant selection studies since it was phytotoxic when tested with Lemna gibba and Zea mays.

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The Use of Amfonelic acid

Amfonelic acid (AFA; WIN 25,978; Oxaprozin) is a consciousness-altering drug and enquiry chemical employed inward technological analyzes. Them comprised attained although researchers cost enquiring refreshing antibiotics. them acts a effective and extremely choosy Dopastat re-uptake inhibitor (DRI).[Twenty-three] them causes a reasonably foresightful half-life of around XII hours. They are presently beingness explored every bit a medicinal drug to commencement the depressant fallouts and heighten the noiciceptive body process of impregnable opioid painkillers.CAS No.: 15180-02-6 Other Names: Amfonelic acid Place of Origin: Jiangsu China (Mainland) Name Amfonelic acidalias B naphthalene nitrous acid benzylSynonyms 1,8-naphthyridine-3-carboxylicacid, 1-ethyl-1,4-dihydro-4-oxo-7-(phenylmethyl) -; 1-Ethyl-1 ,4-dihydro-4-oxo-7-(phenylmethyl) -1,8-naphthyridine-3-carboxylic Acid; 7-Benzyl-1-ethyl-4-oxo-1 ,4-dihydro-1 ,8-naphthyridine-3-carboxylic acid
CAS No. 15180-02-6Molecular formula C18H16N2O3
MW 308.3312InChI InChI = 1/C18H16N2O3/c1-2-20-11-15 (18 (22) 23) 16 (21) 14-9-8-13 (19-17 (14) 20) 10-12-6-4 -3-5-7-12/h3-9, 11H, 2,10 H2, 1H3, (H, 22,23)Type: Auxiliaries and Other Medicinal Chemicals Grade Standard: Medicine Grade Model Number: 15180-02-6 Purity: 99%
Packaging Detail: POA Delivery Detail 3-14 Work days(China Southern Air Cargo , EMS , UPS , TNT) .

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The Introduction of 4-Chloroindole-3-acetic acid

4-Chloroindole-3-acetic acid (4-Cl-IAA) is a potent auxin in various auxin bioassays. Researchers have used 4-Cl-IAA as well as other halogenated auxins in biological assays to understand the structural features of auxins required to induce auxin mediated growth in plants. 4-Cl-IAA is a naturally occurring auxin in plants from the Vicieae tribe of the Fabaceae family; and 4-Cl-IAA has also been identified in one species outside the Vicieae tribe, Pinus sylvestris. The apparent function of the unique auxin 4-Cl-IAA in normal plant growth and development will be discussed with a focus on Pisum sativum and Vicia faba.

4-Chloroindole-3-acetic acid (4-Cl-IAA) and indole-3-aldehyde (IAId) have been characterized as endogenous constituents in seeds of Pinus sylvestris L. by gas chromatography-mass spectrometry. Quantitative estimates indicate that immature seeds contained 640 pg 4-Cl-IAA (g fresh weight)-1 while mature seeds contained 340 pg (g dry weight)-1. 4-Cl-IAA could not be detected in seeds five days after germination. The content of IAld increased from 127 pg (g dry weight)-1 in mature seeds to 315 pg (g dry weight)-1 after five days of germination.

Auxins are a class of plant growth hormones naturally present in all plants. They have been implicated  in many processes of plant growth and development including stem elongation, root initiation, ethylene biosynthesis, and tissue vascularization . Auxins occurring naturally in plants include indole-3-acetic acid (IAA; Figure 1a), indole-3-butyric acid, phenylacetic acid (a weak auxin) and 4-chloroindole-3-acetic acid. The review will discuss the occurrence and activity of 4-Cl-IAA in plant tissues. A review by Engvild is recommended for other related discussions and references on halogenated auxins beyond the scope of this review.

4-Cl-IAA is a potent auxin generally showing more activity than IAA in standard biological assays. 4-Cl-IAA has been tested in many different bioassays and has been reported to be 1.3 to 50 times more activethan IAA (relative activity equals the concentration of IAA giving half maximal response divided by the concentration of 4-Cl-IAA giving the same response). Stimulation of growth of excised tissues is the standard biological assay for auxins including 4-Cl-IAA and IAA (4-Cl-IAA examples: pea stem split curvature growth, pea stem straight growth,oat and wheat coleoptile growth, and mung bean hypocotyl growth . 4-Cl-IAA treatment also increases root initiation and ethylene evolution in pea shoot cuttings . Reports on 4-Cl-IAA’s effects on the growth of intact plant organs include wheat and cucumber root inhibition, tomato epinasty, tomato parthenocarpy, mung bean growth inhibition and root initiation, and pea pericarp growth .

4-Cl-IAA ismore biologically active than IAAin these assays; however, Stenlid and Engvild  reported that wheat roots were inhibitedmore by IAA treatment than 4-Cl-IAA.4-Cl-IAA’s strong auxin activity has been postulated to occur via reduced metabolism of 4-Cl-IAA,or a receptor and signal transduction pathway unique frond production, IAA and 4-Cl-IAA at 10 _M were only weakly inhibitory. Of the halogenated auxins tested, 5-Br-IAA was proposed for mutant selection studies since it was phytotoxic when tested with Lemna gibba and Zea mays.

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The Introduction of Amfonelic acid

 

Amfonelic acid (AFA; WIN 25,978; Oxaprozin) is a consciousness-altering drug and enquiry chemical employed inward technological analyzes. Them comprised attained although researchers cost enquiring refreshing antibiotics. them acts a effective and extremely choosy Dopastat re-uptake inhibitor (DRI).[Twenty-three] them causes a reasonably foresightful half-life of around XII hours. They are presently beingness explored every bit a medicinal drug to commencement the depressant fallouts and heighten the noiciceptive body process of impregnable opioid painkillers.CAS No.: 15180-02-6 Other Names: Amfonelic acid Place of Origin: Jiangsu China (Mainland) Name Amfonelic acidalias B naphthalene nitrous acid benzylSynonyms 1,8-naphthyridine-3-carboxylicacid, 1-ethyl-1,4-dihydro-4-oxo-7-(phenylmethyl) -; 1-Ethyl-1 ,4-dihydro-4-oxo-7-(phenylmethyl) -1,8-naphthyridine-3-carboxylic Acid; 7-Benzyl-1-ethyl-4-oxo-1 ,4-dihydro-1 ,8-naphthyridine-3-carboxylic acid
CAS No. 15180-02-6Molecular formula C18H16N2O3
MW 308.3312InChI InChI = 1/C18H16N2O3/c1-2-20-11-15 (18 (22) 23) 16 (21) 14-9-8-13 (19-17 (14) 20) 10-12-6-4 -3-5-7-12/h3-9, 11H, 2,10 H2, 1H3, (H, 22,23)Type: Auxiliaries and Other Medicinal Chemicals Grade Standard: Medicine Grade Model Number: 15180-02-6 Purity: 99%
Packaging Detail: POA Delivery Detail 3-14 Work days(China Southern Air Cargo , EMS , UPS , TNT) .

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What is Azoxymethane

Azoxymethane  is a kind of Xi Shu and Xuan-induced rat colon cancer with a strong role in the material. Colorectal cancer has been widely used as a simulation of the carcinogenic substance made ​​of material exploration and cancer prevention mechanism of the study. This product increased risk of colon cancer, the more active substances in cancer prevention exploration, has an extremely important role.

Azoxymethane (AOM) is one kind of strong effect carcinogen, uses in inducing the big mouse and the mouse colon cancer. 2,3 Azoxymethane induces carcinogenesis.1 the azoxymethane preventive treatment appraisal curative effect the research, and already in use, also often uses for to judge between other people’s chemopreventative result, specially food, like undigestable sugars4,5, red meat6 and green tea7 in rodent model. These rodent model’s result is helpful to the recognition possible precautionary approach, by human colon cancer.8 transformation growth factor Beta (TGF-β) the change or the unusual signal are developing and the AOM.9 treatment mouse’s tumor examination, 10 azoxymethane treatment epidermis growth factor acceptor tyrosine activating enzyme activates intrinsic simultaneously stimulates synthesizes TGF- the alpha.11 epoxy synthase 2 (COX- 2) inhibitor NS – 398 (product to number N194)

azoxymethane.12 to treat the big mouse cancer pre-cell’s disease incidence rate to reduce.

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The Introduction of D-Azetidine-2-carboxylic acid

English name: D-AZETIDINE-2-CARBOXYLIC ACID
English synonyms: (R)-AZETIDINE-2-CARBOXYLIC ACID; D-AZETIDINE-2-CARBOXYLIC ACID; (2R )-(+)- AZETIDINE-2-CARBOXYLIC ACID; D-(R)-AZETIDINE-2-CARBOXYLIC ACID ; D-(R)-Azetidine-2-Carboxylic; DH-Aze-OH; (R)-2-Azetidinecarboxylic acid; D-2-Azetidinecarboxylic acidCAS: 7729-30-8Molecular formula: C4H7NO2Molecular weight: 101.1
EINECS:
Related Categories: pharmacetical; Amino Acids 13C, 2H, 15N; Amino Acids & Derivatives; pharmaceutical intermediates
Mol File: 7729-30-8.molCategory: Amino Acids & DerivativesPhysical properties: White Crystalline Solid
Application Note: A four-membered ring analog of L-Proline. A useful intermediate in the synthesis of polypeptides.



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The Application of Hydroxyatrazine

Hydroxyatrazine alias: 2-hydroxyl-4-(ph)-6-(isopropylamino)-S-three polybenzoxazines, hydroxydechloroatrazine, 4-(ph)-2-hydroxyl-6-(isopropylamino selectiely rebind triazines was high price to buy.Formula: C8H15N5O.Molecular weight: 197.24 Dalton .A single isotope molecular weight: 197.1276601296 Dalton.EHSY lab provides quality pesticides, herbicides and performance to meet your various needs of different work environments.
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The Introduction of D-Azetidine-2-carboxylic acid

English name: D-AZETIDINE-2-CARBOXYLIC ACIDEnglish synonyms: (R)-AZETIDINE-2-CARBOXYLIC ACID; D-AZETIDINE-2-CARBOXYLIC ACID; (2R )-(+)- AZETIDINE-2-CARBOXYLIC ACID; D-(R)-AZETIDINE-2-CARBOXYLIC ACID ; D-(R)-Azetidine-2-Carboxylic; DH-Aze-OH; (R)-2- D-acridine 2 – carboxylate; (R) – azetidine 2 – carboxylate; D-azetidine 2 – carboxylate; (R) – cyclobutane -2 – carboxylic acid; acridine 2 – carboxylate; (R) – azetidine-2 – carboxylic acidAzetidinecarboxylic acid; D-2-Azetidinecarboxylic acidCAS: 7729-30-8Molecular formula: C4H7NO2Molecular weight: 101.1EINECS:Related Categories: pharmacetical; Amino Acids 13C, 2H, 15N; Amino Acids & Derivatives; pharmaceutical intermediatesMol File: 7729-30-8.mol


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The Introduction of Methyl 2-(5-bromo-2-hydroxyphenyl)acetate

English Name: METHYL 2 - (5-BROMO-2-HYDROXYPHENYL) ACETATE English synonyms: METHYL 2 - (5-BROMO-2-HYDROXYPHENYL); METHYL 2 - (5-BROMO-2-hYDROXYPHENYL) ACETATE Chinese name: 2 - (5 - bromo-2 - hydroxy-phenyl) methyl acetateCAS: 220801-66-1Chinese Synonyms: 2 - (5 - bromo-2 - hydroxyphenyl) methyl acetate; 2 - (5 - bromo -2 - hydroxyphenyl) acetate
CBNumber: CB4287690 formula: C9H9BrO3 Molecular Weight: 245.07.
Description:Methyl 2-(5-bromo-2-hydroxyphenyl)acetate,Methyl 2-(5-bromo-2-hydroxyphenyl)acetate,Methyl 2-(5-bromo-2-hydroxyphenyl)acetate,Methyl 2-(5-bromo-2-hydroxyphenyl)acetate,Methyl 2-(5-bromo-2-hydroxyphenyl)acetate,Methyl 2-(5-bromo-2-hydroxyphenyl)acetate,Methyl 2-(5-bromo-2-hydroxyphenyl)acetate.



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The Use of N-Methyl-N-nitro-N-nitrosoguanidine

 N-Methyl-N-nitro-N-nitrosoguanidine (MNNG) of the experimental animal (v. 4 international cancer research organization, in 1974, the 1987 international cancer research institutions seven) the carcinogenicity has enough evidence. N-methyl-N-nitro-N-and the nitro pill is in all the test species had carcinogenicity: mice, rats, hamster, rabbits and dog. In rat drinking water management, MNNG induction adenoma, adenocarcinoma, a few leiomyosarcoma, and in rat glandular stomach seal ring cell carcinoma. Additional malignant tumor, especially in high concentrations of observation, in the duodenum, jejunum and mesenteric, along with forestomach and liver cancer papilloma. When drinking water management, MNNG induction of leiomyosarcoma, the stomach wall of the cyst, neonatally graft into the subcutaneous tissue in mice. When drinking water management, MNNG induced gastric adenocarcinoma male hamster glands and sarcoma. Drinking water management, it causes four, study the dog gastric adenocarcinoma. The main part in the heart, and in the distal tumor local. When filling the drug stomach, MNNG induce squamous cell carcinoma and papilloma 63 male mice a single dose of the stomach;
In the study of the species used in the digestive tract of the tumors occur spontaneously is thought to be in very rare. When as a single high doses to fill the stomach medicine, composite induction rats glands and forestomach malignant tumors. When the management of a series of irregular stomach irrigation treatment, this compound induce squamous epithelium papilloma and squamous cell carcinoma of the two sexes in forestomach rat glandular stomach, liver and peritoneal tumors. When through the give subcutaneously, adult rats induced by injection parts of the composite fibrosarcoma and pleomorphism sarcoma. In a similar study, fibrosarcoma and leiomyosarcoma male rats induced by injection site. Newborn rat MNNG development adenocarcinoma, fibrosarcoma, and small intestine myosarcomas a single subcutaneous injection. A single subcutaneous injection of lung and liver caused by MNNG tumor and hemangioendotheliomas mice. When intraperitoneal injection to medicine, MNNG induction appendix, the ileum, in male mice jejunum benign and malignant tumors. By a single intraperitoneal injection to medicine, the compounds of induction male rats, and in lactation rats stomach and intestine carcinoma and sarcoma stomach, jejunum and caecum tumor. When rectum perfusion, this compound caused by one or more adenomatous polyps and seven nine rats in the colon and rectum polyp carcinoma. In the IARC working group without censorship, when local, male and female mice induced MNNG skin papilloma and carcinoma recent research.



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The Brief Introduction of Hydroxyatrazine

Hydroxyatrazine alias: 2-hydroxyl-4-(ph)-6-(isopropylamino)-S-three polybenzoxazines, hydroxydechloroatrazine, 4-(ph)-2-hydroxyl-6-(isopropylamino selectiely rebind triazines was high price to buy.Formula: C8H15N5O.Molecular weight: 197.24 Dalton .A single isotope molecular weight: 197.1276601296 Dalton.EHSY lab provides quality pesticides, herbicides and performance to meet your various needs of different work environments.
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The Use of Hydroxypivaldehyde

Hydroxy  pivaldehyde  admitted on a different aldehydes chemical reaction by butyl methanal, inward the balance from approximative dozen, inwards a catalytic amount of money from III processes subsist, bring forth chemical reaction concoction, curbs forty-two to fifty wt % from hydroxyl-pivaldehyde output cognitive operation, twenty-eight to thirty-five wt isubutyraldehyde %, approximately eighteen% from the body of water, approximately deuce wt % ternion operations and the endorsement chemical reaction mathematical product of approximately 18%, and reconstruct the hydroxyl radical pivaldehyde from this. Convalescence footfalls include at any rate a component part of the free weight from the water supply with 1 component part of the solution, distillation came down force per unit area incurred resolution, fashionable temperature down the stairs 65 ℃, create a good-hearted of fractions comprise contrastive butyl aldehyde, ternary processes and irrigate, and water supply resolution pivaldehyde comprising hydroxyl, holding hydroxyl radical fashionable aqueous result pivaldehyde temperature reduction, temperature reduction solution holding back hydroxyl radical pivaldehyde more or less 15 ° ~ 20 ° atomic number 6 to confidential information to the crystallization of hydroxyl-pivaldehyde, permeate to arrest quartz glass*, watch crystal with low temperature water to wash drawing water system, and then the prohibitionist aura fashionable the crystal, and by the fuss hard liquor crystallisation liquid-liquid extraction fashionable the environmental temperature economic consumption approximately a antithetical threesome (butyl measure the engender hard drink.


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What is Hydroxy pivaldehyde

Hydroxy  pivaldehyde  included with different aldehydes reaction of butyl formaldehyde, in the proportion of approximate 1:2, in a catalytic amount of three procedures exist, produce reaction mixture, contains 42 to 50 wt % of hydroxyl-pivaldehyde production process, 28 to 35 wt isubutyraldehyde %, about 18% of the water, about 2 wt % 3 procedures and the second reaction product of about 18%, and restore the hydroxyl pivaldehyde from this. Recovery steps include at least a part of the weight of the water with 1 part of the solution, distillation reduced pressure obtained solution, in temperature below 65 ℃, produce a kind of fractions contain different butyl aldehyde, three procedures and water, and water solution pivaldehyde containing hydroxyl, containing hydroxyl in aqueous solution pivaldehyde cooling, cooling solution containing hydroxyl pivaldehyde about 15 ° ~ 20 ° C to lead to the crystallization of hydroxyl-pivaldehyde, filter to get crystals, crystal with cold water to wash water, and then the dry air in the crystal, and by the mother liquor crystallization liquid-liquid extraction in the environmental temperature use about a different 3 (butyl quantity the mother liquor.

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The Use of Hydroxyatrazine

Hydroxyatrazine alias: 2-hydroxyl-4-(ph)-6-(isopropylamino)-S-three polybenzoxazines, hydroxydechloroatrazine, 4-(ph)-2-hydroxyl-6-(isopropylamino selectiely rebind triazines was high price to buy.Formula: C8H15N5O.Molecular weight: 197.24 Dalton .A single isotope molecular weight: 197.1276601296 Dalton.EHSY lab provides quality pesticides, herbicides and performance to meet your various needs of different work environments.
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The Brief Introduction of 2,3-Diphospho-D-glyceric acid pentacyclohexylamine salt, 98%

2,3-Diphospho-D-glyceric acid pentacyclohexylamine salt, 98%‘s CAS is 62868-79-5.Molecular Formula is C10H11NO2.Molecular Weight is 177.1998,2,3-Diphospho-D-glyceric acid penta(cyclohexylammonium) salt; (2R)-2,3-bis(phosphonooxy)propanoic acid – cyclohexanamine (1:5).

In chemistry , the chemical substance is a substance with constant chemical composition and characteristics . It can not be divided into components, the physical separation method , which does not break chemical bonds . They can be solid, liquid or gas .

Chemicals commonly referred to as ‘ pure ‘ to make them in addition to the mixture. A common example is the pure water chemicals, it has the same nature and the same ratio of hydrogen and oxygen is isolated from the river or in a laboratory . Other common chemicals in a pure form of diamond , gold, salt , sugar and so on. However, the seemingly simple or pure substance of the material found in nature can actually be a mixture of chemical substances . For example , tap water may contain small amounts of dissolved compounds, sodium chloride , iron, calcium and other chemicals .

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The Introduction of 2-Bromo-1,1-difluoroethane

2-Bromo-1,1-difluoroethaneItem ,Code : 42086042Category:Blood System Agents

Keywords :2-Bromo-1,1-difluoroethane products,2-Bromo-11-difluoroethane,359-07-9,1-bromo-22-difluoroethane

Purity: 98%

Material properties of the constant:
Gb Numbers 21028 cas number 75-37-6 English name 1, 1-difluoroethane don't name freon-152 molecular formula c2h4f2; Ch3chf2 appearance and properties colorless no odor molecular weight 66.05 the vapor pressure kpa / 21.1 ℃ to 531.96 ℃ melting point-117 boiling point: 25.7 ℃ solubility insoluble in watertight degrees relative density (water = 1) 1.00; The relative density (air = 1) 2.28 stability stable risk marker 4 (flammable gas) main use used for cooling agent, aerosol agents and synthetic organic intermediates
Of the impact on the environment:
A health hazard,
Invading way: inhaled.
Health hazard: there are choking role. Excessive contact cause dizziness, directional obstacles, excitable, central nervous system depression, etc.
Second, the toxicology material and environmental behavior
Toxicity of low class. Acute toxicity: lc50977000mg/m3, 2 hours (mice inhaled) subacute and chronic toxicity: rats inhaled 10%, 16 hours/day, 2 days, lungs have mild inflammation, cell infiltrates. Dangerous characteristics: mixed with air explosive mixture can be formed. The heat source and a burning flame in explosion. Thermal decomposition of fluoride gas emits poisonous. And antioxidant contact a violent reaction.
Burning (breakdown) product: carbon monoxide, carbon dioxide, currently. 3. The scene emergency monitoring methods: instrument law 4. Laboratory monitoring methods:
Chromatography, and by reference to the chemical analysis handbook (fourth janaesth, chromatographic analysis), chemical industry press
5. Environmental standards:
The former Soviet union in the air of workplace of the maximum allowed harmful material concentration 3000 mg/m3
6. Emergency disposal methods:
1. leak, emergency treatment
Leave quickly leakage pollution area personnel to windward and isolation, strictly limited to come and go. Cut off the fire. Suggest the emergency treatment personnel wearing self positive pressure type respirator, wear fire protective clothing. Cut off the leak source as possible. With industrial layer or absorbent adsorption/cover leak near the place such as sewer, to prevent gas into. Reasonable ventilation, accelerate the spread. Spray shape water dilute, dissolve. Build beach or have dug a pit for a large number of wastewater produced. Be like likely, will leak out with exhaust fan sent to the empty place or installed appropriate nozzle burned. Also can use the pipeline to lead to the oven, concave ground the burning. A flat container to properly handle, repair, with again after testing.
2. protective measures
Respiratory system protection: generally don't need special protection, high concentrations of contact can generally do not need to special protection, but suggest special circumstances, wear self-priming filter type gas mask (half a mask).
Eye protection: when necessary, wear chemical safety protective glasses.
The body protection: wear anti-static work clothes.
Hand protection: general work wear protective gloves.
Other: work site no smoking. Into the pot, restrictive space or other high concentration area work, must be watched.
3. emergency measures
Inhalation: quickly from the scene to fresh air place. Keep airway open. Such as difficulty breathing, to oxygen. Such as stopped breathing, once artificial respiration. Go to a doctor.
Fire extinguishing method: cut off the air supply. If you can't immediately cut off gas source, is not allowed out of the burning gas. Water spray cooling container, possible will be moved to the empty containers from the fire place. Agent: mist water, foam, carbon dioxide, dry powder.

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What is N-Methyl-N-nitro-N-nitrosoguanidine

 N-Methyl-N-nitro-N-nitrosoguanidine (MNNG) induction adenoma, adenocarcinoma, a few leiomyosarcoma, and in rat glandular stomach seal ring cell carcinoma. Additional malignant tumor, especially in high concentrations of observation, in the duodenum, jejunum and mesenteric, along with forestomach and liver cancer papilloma. When drinking water management, MNNG induction of leiomyosarcoma, the stomach wall of the cyst, neonatally graft into the subcutaneous tissue in mice. When drinking water management, MNNG induced gastric adenocarcinoma male hamster glands and sarcoma.
In the study of the species used in the digestive tract of the tumors occur spontaneously is thought to be in very rare. When as a single high doses to fill the stomach medicine, composite induction rats glands and forestomach malignant tumors. When the management of a series of irregular stomach irrigation treatment, this compound induce squamous epithelium papilloma and squamous cell carcinoma of the two sexes in forestomach rat glandular stomach, liver and peritoneal tumors. When through the give subcutaneously, adult rats induced by injection parts of the composite fibrosarcoma and pleomorphism sarcoma. In a similar study, fibrosarcoma and leiomyosarcoma male rats induced by injection site. Newborn rat MNNG development adenocarcinoma, fibrosarcoma, and small intestine myosarcomas a single subcutaneous injection. A single subcutaneous injection of lung and liver caused by MNNG tumor and hemangioendotheliomas mice. When intraperitoneal injection to medicine, MNNG induction appendix, the ileum, in male mice jejunum benign and malignant tumors. By a single intraperitoneal injection to medicine, the compounds of induction male rats, and in lactation rats stomach and intestine carcinoma and sarcoma stomach, jejunum and caecum tumor. When rectum perfusion, this compound caused by one or more adenomatous polyps and seven nine rats in the colon and rectum polyp carcinoma. In the IARC working group without censorship, when local, male and female mice induced MNNG skin papilloma and carcinoma recent research.


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What is Hydroxyatrazine

Hydroxyatrazine alias: 2-hydroxyl-4-(ph)-6-(isopropylamino)-S-three polybenzoxazines, hydroxydechloroatrazine, 4-(ph)-2-hydroxyl-6-(isopropylamino selectiely rebind triazines was high price to buy.Formula: C8H15N5O.Molecular weight: 197.24 Dalton .A single isotope molecular weight: 197.1276601296 Dalton.EHSY lab provides quality pesticides, herbicides and performance to meet your various needs of different work environments.Many well-known brands as partners, EHSY lab for its excellent quality and service to ensure your employees on occupational health, safety environment and a better future.


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The Introduction of Hydroxy pivaldehyde

Hydroxy  pivaldehyde  included with different aldehydes reaction of butyl formaldehyde, in the proportion of approximate 1:2, in a catalytic amount of three procedures exist, produce reaction mixture, contains 42 to 50 wt % of hydroxyl-pivaldehyde production process, 28 to 35 wt isubutyraldehyde %, about 18% of the water, about 2 wt % 3 procedures and the second reaction product of about 18%, and restore the hydroxyl pivaldehyde from this. Recovery steps include at least a part of the weight of the water with 1 part of the solution, distillation reduced pressure obtained solution, in temperature below 65 ℃, produce a kind of fractions contain different butyl aldehyde, three procedures and water, and water solution pivaldehyde containing hydroxyl, containing hydroxyl in aqueous solution pivaldehyde cooling, cooling solution containing hydroxyl pivaldehyde about 15 ° ~ 20 ° C to lead to the crystallization of hydroxyl-pivaldehyde, filter to get crystals, crystal with cold water to wash water, and then the dry air in the crystal, and by the mother liquor crystallization liquid-liquid extraction in the environmental temperature use about a different 3 (butyl quantity the mother liquor.


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