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METHYLENE CHLORIDE

Product Information

Due to its high solvent capacity,methylene chloride offers a range ofwidely versatile applications.

Methylene chloride acts as a solventand extraction agent for lubricants,oils, mineral oils, waxes, resins,cellulose ester, caffeine, etc. in themetal-working, textiles, leather,plastics, pharmaceuticals and foodindustries. It is also used as acomponent in paint stripping and

metal degreasing agents, as propel-lant additive and in removal-agentformulations for the production ofpolyurethane foam.

Methylene chloride is also well-knownas a highly efficient solvent and pro-pellant component in sprays, wherebyits application in cosmetic preparati-ons is restricted to 35%(EC Dir. 96/335).

Due to its volatility, exercise particularcaution during application and hand-

ling of methylene chloride.

Information relating to the environ-ment, health and safety:

Methylene chloride evaporates morerapidly than other solvents normallyemployed in industrial applications.

Make sure, therefore, that thethreshold limits values for solventvapour concentrations in the work-place are not exceeded and thatrestrictions on emissions are main-tained. Take special precautionswhere necessary (additional ventila-tion, possibly protective masks). Anypertinent restrictions onemissions should be observedaccording to each application.

Methylene chloride does not destroythe ozone layer. It influences only toa very minor extent smog formation,global warming and acid rain.Methylene chloride is biologicallydegradable in the environment.

instruct them in standard safety pro-cedures.

For further details, please refer tothe safety data sheets.Your localDow office or distributor will be plea-sed to provide you with anyfurther information.

As with other CHCs, methylenechloride may have a detrimentaleffect on health and the environ-ment if incorrectly applied. It is the-refore vitally important to train per-sonnel in the safe handling, storageand disposal of CHCs and to

Chemical description Methylene chloride(Dichloromethane)

Formula CH2CI2

Molecular weight (g/mol) 84,94

CAS No. 000075-09-2

EINECS No. 200-838-9

EEC index no. 602-004-00-3

Boiling point 40 C

Freezing point -97 C

Flash point none (PMCC/TOC/COC)

Incipient thermal decomposition 120 C

Autoignition temperature 640 C

Flammability limits (vol. % in the air) 13-22

Flammability limits (vol. % in oxygen) 15-67

Distribution coefficient Log. P (octanol/water) 1,25

Solubility (solvent in water) 2,0 wt. % (25 C)

Solubility (water in solvent) 0,2 wt. % (25 C)

Azeotropic with water (boiling point) 38,1C

Azeotropic with water (water in condensate) 1,5 wt. %

Density (20 C) 1,325 g/cm3

Volume Coefficient of expansion, 20 30C 0,0014/C

Viscosity (20 C) 0,425 mPas

Surface tension (20 C) 28,12 mN/m

Specific heat 1,0 kJ/kg/ C

Vaporization heat at boiling point 330 kJ/kg

Vapour density (air = 1.00) 2,93

Dielectric strength 24 000 V

Dielectric constant (24 C, 100 MHz) 10,7

Specific resistance (24 C, ohm cm) 1,81 x 108

Relative evaporation rate (diethyl ether = 1) 2

Kauri-butanol value 136

Physical and chemical properties of methylene chloride

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-20C 0C 20C 40C

Vapour pressure hPa 64,9 191 474 1 025

Saturation concentration g/m3 273 742 1 709 3 456ppm 64 084 188 638 467 522 1 012 043

Notice: The above data have been obtained in laboratory tests and are typical of the product. They do not however constitute sales specificationsand should not be regarded as such.

Physical and chemical properties of methylene chloride

*Trademark of The Dow Chemical Company

Notice: The information and data contained herein do not constitute sales specifications.The product properties may be changed without notice.

No liability, warranty or guarantee of product performance is created by this document. It is the Buyers responsibility to determine whether Dow

products are appropriate for Buyers use and to ensure that Buyers workplace and disposal practices are in compliance with applicable laws and

regulations. No freedom from any patents or other industrial or intellectual property rights is granted or to be inferred.

(April 1998)

CH 111-166-E-0998

UK: OEL list EH 40/98, MEL ppm 100

mg/m3

348US: ACGIH (1997), TLV ppm 50

mg/m3 174

Workplace concentration