Dichloromethane is a compound formed by replacing two hydrogen atoms in a methane molecule with chlorine atoms, with the molecular formula CH₂Cl₂. It is a colorless, transparent, heavier-than-water, volatile liquid with an ether-like odor and a sweet taste.

It is non-flammable but forms an explosive mixture when mixed with high concentrations of oxygen. Dichloromethane is slightly soluble in water and miscible with most common organic solvents. It is also miscible with other chlorinated solvents, ether, ethanol, and N,N-dimethylformamide in any proportion. At room temperature, dichloromethane is poorly soluble in liquid ammonia but dissolves rapidly in phenols, aldehydes, ketones, glacial acetic acid, triethyl phosphate, formamide, cyclohexamine, and ethyl acetate. Relative density: 1.3266 (20/4°C).

Melting point: -95.1°C. Boiling point: 40°C. A non-flammable low-boiling-point solvent, it is commonly used as a substitute for flammable petroleum ether, ether, etc., and can also be used as a dental local anesthetic, refrigerant, and fire extinguishing agent, etc.

Autoignition temperature: 640°C. Viscosity (20°C): 0.43 mPa·s. Refractive index nD (20°C): 1.4244. Critical temperature: 237°C. Critical pressure: 6.0795 MPa. Upon thermal decomposition, it produces HCl and trace amounts of phosgene. When heated with water over an extended period, it forms formaldehyde and HCl. Further chlorination yields CHCl₃ and CCl₄.
Properties
Pure dichloromethane has no flash point. A solvent mixture containing equal volumes of dichloromethane and gasoline, solvent naphtha, or toluene is non-flammable.

However, when dichloromethane is mixed with acetone or methanol in a 10:1 ratio, the mixture has a flash point, and its vapor forms an explosive mixture with air, with an explosive limit of 6.2% to 15.0% (by volume).

The primary application of dichloromethane is as a solvent. Dichloromethane possesses strong solvent properties, a low boiling point, and relatively low toxicity and reactivity, making it the most frequently used organic solvent in organic synthesis. Its role as a solvent is nearly equivalent to that of water in inorganic salt chemistry.

It is extensively used in the production of safety film, polycarbonate, and as a solvent for coatings, metal degreaser, aerosol propellant, polyurethane foam agent, release agent, and paint remover. In the pharmaceutical industry, it serves as a reaction medium for the preparation of ampicillin, amoxicillin, and cephalosporin, among others; it is also used as a solvent in film production, a petroleum dewaxing solvent, an aerosol propellant, an organic synthesis extractant, a foaming agent for polyurethane and other foam plastics, and a metal cleaner.

Film production accounts for 50% of total consumption, pharmaceuticals account for 20%, cleaning agents and the chemical industry account for 20%, and other applications account for 10%.

Q1:What is the purity level of the products you offer?
A: Our products typically offer high purity levels (e.g., Analytical Grade, Reagent Grade, or specific Industrial Grades), suitable for both laboratory research and industrial manufacturing. Please refer to the product specification sheet for exact technical indicators.
Q2:Which industries can these products be used in?
A: These chemicals are widely used in organic synthesis, pharmaceutical manufacturing, agrochemical production, plastics processing, coating and paint dilution, electronic cleaning, textile dyeing, and analytical testing.
Q3:What is the Minimum Order Quantity (MOQ)?
A: The MOQ depends on the specific product grade and packaging size. Don’t hesitate to get in touch with our sales team or check the detailed product page for comprehensive information.
Q4:How should these chemicals be stored safely?
A: They should be stored in a dry, cool, and well-ventilated area, away from heat sources, sparks, and incompatible materials (such as strong oxidizers, strong acids/bases). Containers must be kept tightly sealed.
Q5:How should spills or leaks be handled?
A: Immediately evacuate non-essential personnel, eliminate all ignition sources, and proceed with cleanup only after ensuring personal protection (wearing appropriate PPE). Small spills can be absorbed with inert materials (like sand or earth), collected in a sealed container, and disposed of according to local regulations. Prevent material from entering sewers or drains.