Methylene chloride Industrial grade

Dichloromethane

F30(chlorocarbon);Freon 30;Freon30;Khladon30;M-clean D;Metaclen;Methane dichloride;Methane, dichloro-

75-09-2

CH2Cl2

YMWUJEATGCHHMB-UHFFFAOYSA-N

84.93

1730800

200-838-9

TSCA listed

APHA: ≤10

2903 12 00

Organic Reagents

λ: 235 nm Amax: 1.00λ: 240 nm Amax: 0.20λ: 250 nm Amax: 0.05λ: 260 nm Amax: 0.02λ: 340-400 nm Amax: 0.01

Clear, colorless liquid with a sweet, penetrating, ethereal odor. Leonardos et al. (1969) determined an odor threshold concentration of 214.0 ppmv. The average least detectable odor threshold concentrations of technical grade methylene chloride in water at 60 °C and in air at 40 °C were 5.6 and 24 mg/L, respectively (Alexander et al., 1982).

Reactivity with Water No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

1.325 g/mL at 25 °C(lit.)

-97 °C

39.8-40 °C mm Hg(lit.)

n20/D1.424(lit.)

20 g/L (20 ºC)

24.45 psi ( 55 °C)

2.9 (vs air)

Dichloromethane is usually released to the atmosphere. It can react withhydroxyl radicals with a half-life of about a fewmonths. Dichloromethane released to water can be evaporated to atmosphere with a half-life of 35.6 h at moderate mixing conditions. Some of dichloromethane in water can be biodegraded completely within several hours and a few days. Small part of dichloromethane released to water can be degraded by hydrolysis. However, hydrolysis is not an important process under natural condition and may take 18 months or more to degrade completely. Dichloromethane released to soil will go to the soil surface and then the atmosphere. Some part of dichloromethane in soil will leak to the groundwater and water cycle.DCM’s production and use as solvent, chemical intermediate, grain fumigant, paint stripper and remover,metal degreaser, and refrigerant may result in its release to the environment through various waste streams. Vapor-phase DCM is expected to be degraded in the atmosphere by reaction with photochemically produced hydroxyl radicals; the half-life for this reaction in air is estimated to be approximately 119 days (in the absence of direct photolysis). If released to soil,DCMis expected to have very high mobility based on an estimated Koc of 24. Volatilization from moist soil surfaces is expected to be an important fate process based on an estimated Henry’s law constant of 3.25×10-3atm-m3mol-1. DCM may volatilize from dry soil surfaces based on its vapor pressure. Biodegradation in soil may occur. DCM, when released into water, is not expected to adsorb to suspended solids and sediment in water based on the estimated Koc. Biodegradation is possible in natural waters but will probably be very slow compared with evaporation.

Noncombustible. Dichloromethane vapor concentrated in a confined or poorly ventilated area can be ignited with a high-energy spark, flame, or high-intensity heat source.

Odor threshold 160 to 230 ppm

7 (20°C)

2.49 at 30 °C (headspace-GC, Sanz et al., 1997)

Methylene chloride is a colourless liquid with a mild, sweet odour. Somewhat water soluble. Subject to slow hydrolysis which is accelerated by light.

Dichloromethane reacts vigorously with active metals such as lithium, sodium and potassium, and with strong bases such as potassium tert-butoxide. Dichloromethane is incompatible with strong oxidizers, strong caustics and chemically active metals such as aluminum or magnesium powders. The liquid will attack some forms of plastic, rubber and coatings. Dichloromethane reacts with sodium-potassium alloy, (potassium hydrogen + N-methyl-N-nitrosurea), nitrogen tetraoxide and liquid oxygen. Dichloromethane also reacts with titanium. On contact with water Dichloromethane corrodes iron, some stainless steels, copper and nickel. Dichloromethane is incompatible with alkali metals. Dichloromethane is incompatible with amines, zinc and alloys of aluminum, magnesium and zinc. Dichloromethane is liable to explode when mixed with dinitrogen pentaoxide or nitric acid. Mixtures of Dichloromethane in air with methanol vapor are flammable.

556 °C

room temp