GB
CAS No. 22045, Molecular Formula CCl₂F₂
75-71-8; Cl₂CF₂
molecular 120.92

odorless and colorless gas; 506.62kPa vapor pressure (16.1 ° C); -158 ° C melting point ; boiling point -29.8 ° C; solubility : not soluble in water, soluble in alcohol, ether; density : relative density (water = 1) 1.46 (-30 ° C); the relative density (Air = 1) 4.2; Stability : stability; risk Marker 5 (Unburning gases); the main purposes : as a refrigerant, gas dissolved pesticides fired agent

2.对环境的影响:
该物质对大气臭氧层有级强破坏力，还应注意对地表水、土壤�?大气和饮用水的污染�?

a health hazard

pathways : inhalation.
health hazards : a pair of heart toxicity strong and quick substances. Animals can cause arrhythmia, ventricular tachycardia, bradycardia, atrioventricular block, acute heart failure, lowering blood pressure and other cardiovascular system changes. A large number of foreign inhalation caused fatal rhythm disorder, prostration, echocardiography arrest deaths were reported.

two, toxicology information and environmental behavior

toxicity : is low toxicity category.
acute toxicity : LD₅₀> 1000mg/kg (rat oral); LC₅₀ 80% concentration x 30 minutes (rat inhalation), 80% concentration x 30 minutes (rabbit inhalation); inhalation 50% concentration, died; inhalation × 10% concentration for a few minutes, loss of consciousness; inhalation 0.25 ~ 0.35% concentration, fatigue flu
subacute and chronic toxicity : large / guinea pigs inhaled 4000mg/m3 x 90, 2 / 15 deaths, fatty liver degeneration; rats / rabbit inhalation of 5% ~ 2.5 × 2 hours / day x 15, metabolism minimal impact.

hazardous characteristics : Unburning. Decomposition by high fever and emit toxic fluoride and chloride gas.
combustion (decomposition) products : carbon monoxide, carbon dioxide, hydrogen fluoride, hydrogen chloride.

3. Emergency Monitoring Methods :
Instrumental

4. Laboratory monitoring methods : gas chromatography
"urban and industrial wastewater analysis of organic compounds," such as Wang Ke translated
GC "Solid Waste Assessment Test and Analysis Handbook" China Environmental Monitoring Director station translated
chromatography / mass spectrometry method of France and American EPA524.2

5. Environmental standards :
former Soviet air workshop harmful substances 3000mg/m3
maximum allowable concentration of the former Soviet Union (1975) Water harmful substances maximum allowable concentration of 10 mg / L k

6. Emergency treatment and disposal methods :

a leakage contingency

rapid withdrawal of staff from air leakage supremacy wind and isolation and strict restrictions on access. Cut off the fire source. Recommended emergency personnel wearing respirators-positive pressure self-sufficiency, wearing overalls general operations. As far as possible, cut off the source of leakage. A reasonable ventilation, accelerated proliferation. If possible, use immediately. Leak containers should be properly handled, repair, testing later use.
waste disposal methods : Proposed burning law. Waste and other fuel mix burning, burning to the full, to prevent the formation of phosgene. Incinerator emission of hydrogen through halogenated acid scrubber to remove.

two protective measures

respiratory protection : concentration in air overweight, they should wear self-absorption filter respirators (half-mask).
eye protection : when necessary, wearing chemical protective safety glasses.
physical protection : general operating wear protective clothing.
hand protection : Wear protective gloves general operations.
other : avoid high concentrations of respirable. Enter cans, or other restrictive space of high concentration operations, someone custody.

three, and emergency measures

Inhalation : rapidly from the scene to fresh air. To keep the airway patency. If breathing is difficult, give oxygen. If the heartbeat stopped breathing, and immediately mouth of thoracic cardiac massage. Medical treatment.

fire fighting methods : This Unburning. Cut off the gas source. Cooling water containers, if possible to move containers from the scene empty Department.