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Dichloromethane

Click to enlargeCAS No.: 75-09-2

Molecular formula: CH2Cl2

Molecular weight: 84.93

RTECS No.: PA8050000

HS No.: 2903120090

UN No.: 1593

Hazard cargo No.: 61552

IMDG Page: 6127

I.Physicochemical properties:

1. Appearance and property: Colorless liquid, non-combustible, with the ether-like sugar smell.

2. Freezing point : -95°C

3. Boiling point: 39.75°C

4. Liquid weight (D20°): 1.3255

5. Solubility: 20 G/L (20 °C) 

6. Spontaneous ignition temperature: 640°C.

7. Viscosity (20°C): 0.43mPas.

8. Refractive rate nD (20°C): 1.4244.

9. Critical temperature: 237°C

10. Critical pressure: 6.0795MPa.   

II. Usage:

Used in the noncombustible solvent: metallic paint cleaning, release agent, metal degreasing agent,cellulose triacetate solvent; as solvent in the production of film strip, aerosol, antibiotc, vitamin; foaming agent: used in engineering plastic foaming; used in the production of flame retardant products; instead of F11, F12U products; used in the synthesis of fine chemical products.    

III. Quality standard

Dichloromethane Quality standardQ/YT002-2008

Item

Index

Superior

First class

Qualified

Purity a/%     ≥

99.95

99.90

99.80

Moisture /%            ≤

0.010

0.020

0.030

Acidity(Calculated by HCl)/%  ≤

0.0004

0.0008

Color/Hazen unit (Pt-Co Color No.)   ≤

10

Residue after evaporation/%       ≤

0.0005

0.0010

athe added stabilizer amount in not included in the mass fraction of dichloromethane

IV. Precautions:

Explosion limit of dichloromethane in the air: 8.1-17.2%, is combustible chemical product. With high concentration, long-term contact will cause dizziness, sleepiness, nausea, tinnitus or numb limb, will recover after moving to fresh air, can not cause lasting damage. Contact with eyes can cause pain and irritation, will cause dermatitis in case of long-term contact.    

V. Packing, storage and transportation

Hazard rank: 6.1 type toxic liquid

Hazard cargo packing mark: 15

Packing type: III

Packing materials: Galvanized drum or close tank car

Precautions: Dichloromethaneis packed in galvanized iron drum, black iron drum or tank car, can offer nitrogen protection in case of any special requirements. Should be stored in dry, cool and ventilated warehouse, away from high cencentration oxygen or oxidant and moisture.The transportation shall comply with the PRC road and railway transportation provision on hazard chemicals.

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