Tuesday, December 6, 2011

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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