Dichloromethane CAS#75-09-2
Efficient Solvent：Dichloromethane is highly miscible with a wide range of organic solvents, making it versatile for industrial applications.
Non-Flammable：It is non-flammable, enhancing safety during handling and use in industrial processes.
Effective in Paint Stripping and Cleaning：Due to its solvent properties, dichloromethane is commonly used in paint stripping and cleaning applications.
Volatile Nature: Its volatility allows for efficient extraction processes, making it valuable in chemical industries.
Dichloromethane, also known as methylene chloride, is a compound produced by replacing two hydrogen atoms in the methane molecule with chlorine atoms, giving it the molecular formula CH2Cl2. This chemical appears as a colorless, transparent liquid that is heavier than water and has a characteristic ether-like odor with a slight sweetness. It is non-flammable but can form explosive mixtures when exposed to high concentrations of oxygen. Dichloromethane is only slightly soluble in water but is highly miscible with a wide range of organic solvents, including chlorinated solvents, ether, ethanol, and N, N-dimethylformamide, in any proportion. Due to its volatile nature and solvent properties, it is commonly used in industrial processes like paint stripping, cleaning, and extraction.
Parameters
Melting point | -97 °C |
Boiling point | 39.8-40 °C mm Hg(lit.) |
density | 1.325 g/mL at 25 °C(lit.) |
vapor density | 2.9 (vs air) |
vapor pressure | 24.45 psi ( 55 °C) |
refractive index | n |
Fp | 39-40°C |
| storage temp | room temp |
solubility | Miscible in ethyl acetate, alcohol, hexanes, methanol, diethyl ether, n-octanol, acetone benzene, carbon tetrachloride, diethyl ether and chloroform. |
form | Liquid |
color | APHA: ≤10 |
Specific Gravity | 1.329 (20/20℃) |
Odor | Odor threshold 160 to 230 ppm |
PH | 7 (20°C) |
Odor Threshold | 160ppm |
explosive limit | 13-22%(V) |
Water Solubility | 20 g/L (20 ºC) |
λmax | λ: 235 nm Amax: 1.00 |
Merck | 14,6063 |
BRN | 1730800 |
Henry's Law Constant | 2.49 at 30 °C (headspace-GC, Sanz et al., 1997) |
Dielectric constant | 9.1（20℃） |
Exposure limits | TLV-TWA 50 ppm (～175 mg/m3) (ACGIH); carcinogenicity: Suspected Human Carcinogen (ACGIH), Animal Sufficient Evidence, Human Inadequate Evidence (IARC). |
Stability: | Volatile |
LogP | 1.250 |
Surface tension | 26.5mN/m at 20°C |
CAS DataBase Reference | 75-09-2(CAS DataBase Reference) |
NIST Chemistry Reference | Methylene chloride(75-09-2) |
IARC | 2A (Vol. Sup 7, 71, 110) 2017 |
EPA Substance Registry System | Methylene chloride (75-09-2) |
Absorption | in accordance |
Safety Information |
Hazard Codes | Xn,T,F,N,C |
Risk Statements | 40-39/23/24/25-23/24/25-11-67-36/37/38-68/20/21/22-20/21/22-50-37-34 |
Safety Statements | 23-24/25-36/37-45-16-7-26-61-36/37/39 |
RIDADR | UN 1593 6.1/PG 3 |
WGK Germany | 2 |
RTECS | PA8050000 |
F | 3-10 |
Autoignition Temperature | 556 °C |
Hazard Note | Harmful |
TSCA | Yes |
HS Code | 2903 12 00 |
HazardClass | 6.1 |
PackingGroup | III |
Hazardous Substances Data | 75-09-2(Hazardous Substances Data) |
Toxicity | LD50 orally in young adult rats: 1.6 ml/kg (Kimura) |
IDLA | 2,300 ppm |
Dichloromethane possesses strong solvency and relatively low toxicity. It is extensively utilized in the production of safety films and polycarbonate materials. Additionally, it serves as a solvent in coatings, a metal degreaser, an aerosol propellant, a polyurethane foaming agent, a mold release agent, and a paint remover.
This colorless liquid also finds application as a reaction medium in the pharmaceutical industry, particularly in the synthesis of ampicillin, hydroxybenzyl penicillin, and cephalosporins. Furthermore, it is employed as a solvent in film manufacturing, a dewaxing agent in petroleum processing, an extractant in organic synthesis, a foaming agent for polyurethane and other foam plastics, and as a cleaning agent for metals.
