Chloromethane
| Physicochemical properties | Color and odor state: colorless gas, sweet | Density: 0.92 | |
| Volatile: Extremely volatile (gas at room temperature). | Corrosive: non-corrosive | ||
| Boiling point: -24.2°C | Decomposition: High temperature decomposition produces toxic gases such as hydrogen chloride and phosgene | ||
| Melting point: -97.7°C | Acidity-alkaline: neutral | ||
| Moisture absorption: slightly moisture absorption | Flammability: Flammable | ||
| Spontaneous ignition point: 632°C | Viscosity: no viscosity in gaseous state, low viscosity in liquid state | ||
| Deliquescence: No deliquescence | Flash point: -46°C | ||
| Stability: Stable, avoid contact with strong oxidants and active metal powders | |||
| Solubility: Slightly soluble in water, soluble in ethanol, ether, acetone, benzene, chloroform and most other organic solvents | |||
| Toxicity: Moderate toxicity, has an anesthetic effect on the central nervous system, and has an irritating effect on the skin and mucous membranes | |||
| Various numbers | CAS: 74-87-3 | HS: 2903199090 | EINECS：200-817-4 |
| Uses | Used as refrigerant, local anesthetic, solvent; organic synthesis raw materials to make methylcellulose and methyl chlorosilane; Pesticides, pharmaceutical raw materials, etc | ||
| Hazard category | 2.1 flammable gas | ||
| Fire-fighting measures | Cut off the air source, and if the air source cannot be cut off, the flame at the leakage will not be extinguished. Firefighters must wear air respirators and full-body fire and gas clothing, extinguish the fire in the upwind direction, move the container to an open place, and spray water to cool until the fire is extinguished. Fire extinguishing agent: mist water, foam, carbon dioxide, dry powder. | ||
| Emergency treatment | Skin contact: Immediately remove contaminated clothing, rinse with plenty of running water, and seek medical attention; Eye contact: Immediately lift the eyelids, rinse thoroughly with plenty of running water or saline for at least 15 minutes, and seek medical attention; Inhalation: Quickly leave the scene to a fresh air, keep the airway open, give oxygen for dyspnea, immediately artificial respiration when breathing stops, and seek medical attention; Ingestion: No contact through this route. | ||
| Packaging, storage, transportation | Packaging: High pressure steel cylinder packed in 40kg/bottle, 80kg/bottle. Storage: Cool and ventilated flammable gas special warehouse, away from fire heat sources, storage temperature ≤ 30 °C, stored separately from oxidants and active metal powders, explosion-proof lighting and ventilation facilities, prohibition of spark-prone equipment and tools, and leakage emergency treatment equipment in the storage area. Transportation: Cylinders should be equipped with safety helmets, laid flat and the mouth of the bottle should not cross in the same direction, the height should not exceed the protective fence and the triangular wooden mat should be stuck, the transportation vehicle should be equipped with fire-fighting equipment, the exhaust pipe should be equipped with a fire retardant device, and it is forbidden to load and unload equipment that is prone to sparks, and it is strictly forbidden to mix and transport with oxidizers, reactive metal powders, and edible chemicals. |
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