Product name: Chloromethane
Packing mark: corrosive product
Packaging category: Ⅱ
Physical and chemical properties
Appearance and properties: colorless gas, ether odor
Melting point (℃): -197.7
Boiling point (℃): -23.7
Relative density (water=1): 0.92
Relative density (air=1): 1.78
Saturated vapor pressure (kPa): 506.62(22℃)
Critical temperature (℃): 143.8
Critical pressure (MPa): 6.68
Lower explosive limit〔％ (V/V)〕: 7.0
Upper explosive limit〔％ (V/V)〕: 19.0
Ignition temperature (℃): 632
Partition coefficient of Octanol/water : 0.490
Solubility: Soluble in water, ethanol, and chloroform.
Uses: used as a refrigerant, demethylating agent, also used in organic synthesis.
Pathways: skin contact, inhalation
This product has a stimulating and anesthetic effects, serious damage to the central nervous system, can also damage the liver, kidney and testis. Acute poisoning: mild headache, dizziness, nausea, vomiting, blurred vision, staggering gait, confusion and so on. Severe poisoning may delirium, agitation, convulsions, tremors, visual disturbances, coma, there is one breath odor. Detected in urine formate and ketone body diagnosis. Skin contact can cause chloride evaporates quickly in the surface caused frostbite. Chronic effects: Long-term exposure low concentrations, can occur drowsiness, lethargy, headache, paresthesia, mood swings and other symptoms, there are heavier staggering gait, visual disturbances, and tremors and other symptoms. Toxicological Information: irritation: a rabbit eyes cause eye irritation. Rabbits percutaneous cause respiratory tract irritation, leading to eye irritation. Acute Toxicity: NA.
LC50: 5300mg / m, 4 hours (rat inhalation)
Mixed with air can form explosive mixtures. In case of an explosion caused by sparks or high heat, and the formation of phosgene. Spontaneous contact with aluminum and its alloys of aluminum compounds can generate. Hazardous combustion products: carbon monoxide, carbon dioxide, hydrogen chloride, phosgene. Fire fighting methods: cut off the gas source. If you can not cut off the gas supply, it is not extinguished the flame of the leak. Cooling water containers, if possible to move containers from the scene empty Department. Extinguishing Media: water spray, foam, carbon dioxide.
Stability and reactivity:
Hazardous Polymerization: Will not occur
Conditions to be avoided: Contact moisture biodegradable.
Incompatibility: Strong oxidant.
Strictly confined, to provide adequate local exhaust and general ventilation. The operator must go through specialized training, strict adherence to rules. Proposed operators wear filter respirators (half-mask), wearing chemical protective safety glasses, gas-penetrating protective clothing, wearing anti-chemical gloves. Away from fire, heat, workplace smoking. Use explosion-proof ventilation systems and equipment. Prevent gas leakage into the workplace air. Avoid contact with the oxidant. Handle with care disposal to prevent damaged cylinders and accessories. Equipped with the appropriate variety and quantity of fire equipment and emergency equipment leakage.
Store in a cool, dry, well-ventilated warehouse. Away from fire, heat source. Storage temperature should not exceed 30 ℃. It should be stored separately and oxidant, avoid mixing reservoir. Explosion-proof lighting, ventilation facilities. Prohibit the use of mechanical equipment and tools easy to produce sparks. Storage areas should be equipped with spill response equipment.
You must wear helmets on the cylinder using just bottles during transportation. Cylinders generally flat, and the bottle in the same direction, can not cross; height shall not exceed the vehicle fence board, and with a triangular wooden pad cards firmly to prevent rolling. Transport vehicles should be equipped with the appropriate variety and quantity of fire equipment during transport. Shipment of the goods vehicle exhaust pipe must be equipped with barrier
Fire equipment, prohibit the use of easy to produce sparks of mechanical handling equipment and tools. It is strictly prohibited and oxidant, food chemicals mixed mixed operation. Summer should be sooner or later transport to prevent sun exposure. Stopovers should be away from fire and heat. According to the provisions road transport routes, it is prohibited in residential areas and densely populated areas. Railway transportation to prohibit
Skin contact: If frostbite, medical care treatment. Inhalation: rapidly from the scene to fresh air. Keep the airway open. If breathing is difficult, give oxygen. If breathing stops, artificial respiration immediately. Medical treatment.
ACCIDENTAL RELEASE AND DISPOSAL: rapid withdrawal from air leakage personnel supremacy wind and isolation and strict restrictions on access. Cut off the fire source. Recommended emergency personnel wearing self-Pressurized respirators to wear protective clothing. Cut off the source of leakage as possible. A reasonable ventilation, accelerated proliferation. Water-spray diluted solution. To build a causeway or trenching asylum produce a lot of waste. If possible, residual gas or using exhaust gas leakage sent washing machine tower or fume hood towers connected. Leak containers should be properly handled, repair, testing later use. Waste disposal method: Disposal by controlled incineration. Incinerators emit hydrogen halide removed by acid scrubber.
Engineering controls: strictly confined, to provide adequate local exhaust and general ventilation. Safety shower and eye protection equipment.
Respiratory protection: concentration in air overweight, wearing a gas mask filter type (half-mask). Emergency rescue or evacuation, should wear positive pressure self-contained breathing apparatus.
Eye protection: Wear protective chemical safety glasses.
Physical protection: gas-penetrating protective clothing.
Hand protection: Wear gloves against chemicals.
Maximum acceptable concentration MAC (mg / m3): China 40
Other protection: work site prohibit smoking, eating and drinking. After work, take a shower. Pay attention to personal hygiene.