Dichloromethane
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CAS 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): 0.43mPa·s.
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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