Product Description
Dichloromethane is a compound in which two hydrogen atoms in methane are replaced by chlorine atoms, with the molecular formula CH₂Cl₂. It is a colorless, transparent, volatile liquid that is heavier than water, featuring an ether-like odor and a slightly sweet taste.
Under normal conditions, dichloromethane is non-flammable, although it may form an explosive mixture when combined with high concentrations of oxygen.
Properties
| 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 | n20/D 1.424(lit.) |
| Fp | 39-40°C |
| storage temp. | room temp |
| 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 |
| Odor Threshold | 160ppm |
| explosive limit | 13-22%(V) |
| Water Solubility | 20 g/L (20 ºC) |
| λmax | λ: 235 nm Amax: 1.00 |
| λ: 240 nm Amax: 0.20 | |
| λ: 250 nm Amax: 0.05 | |
| λ: 260 nm Amax: 0.02 | |
| λ: 340-400 nm Amax: 0.01 | |
| Merck | 146063 |
| 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 | 1.25 |
| 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) |
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 | 46091 |
| 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 |
Product Usage
Dichloromethane is a non-flammable, low-boiling solvent widely used in cellulose acetate film formation, aerosols, and the production of antibiotics and vitamins. It also serves as an extraction agent, metal cleaning agent, and degreasing and film-removing chemical.
As a raw material, dichloromethane is used in the production of fungicides such as myclobutanil and imidaclozolin. In addition, it plays a significant role in organic synthesis and the manufacturing of cellulose triacetate fibers, petroleum dewaxing, and metal surface coatings.
Dichloromethane is also applied in grain fumigation and refrigeration systems, including low-pressure freezers and air-conditioning units. Furthermore, it functions as an auxiliary blowing agent in the production of polyether urethane foam and as a primary blowing agent for extruded polysulfone foam.
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