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PHOSGENE
PHOSGENE
- CAS:
- 75-44-5
- MF:
- CCl2O
- MW:
- 98.92
Properties
- Melting point:
- -118°
- Boiling point:
- bp760 8.2°
- Density
- 0.94 g/mL at 20 °C
- vapor pressure
- 1180 mm Hg ( 20 °C)
- refractive index
- 1.3561
- Flash point:
- 4 °C
- storage temp.
- 2-8°C
- solubility
- slightly soluble in H2O; soluble in benzene, toluene
- form
- colorless gas
- color
- colorless
- Odor
- Sweet, hay-like odor at lower levels, pungent at higher levels; detectable at 0.1 to 5.7 ppm
- Water Solubility
- slightly soluble and hydrolyzed in H2O; soluble benzene, toluene [HAW93]
- Merck
- 13,7421
- Exposure limits
- TLV-TWA 0.1 ppm (～0.4 mg/m3 ) (ACGIH, MSHA, OSHA, and NIOSH); 0.2 ppm (15- minute ceiling) (NIOSH); IDLH 2 ppm (NIOSH).
- Dielectric constant
- 4.7（0℃）
Safety Information
- Symbol(GHS)
GHS04,GHS06,GHS05
- Signal word
- Danger
- Hazard statements
- H314-H330
- Precautionary statements
- P260-P264-P280-P301+P330+P331-P303+P361+P353-P363-P304+P340-P310-P321-P305+P351+P338-P405-P501-P260-P271-P284-P304+P340-P310-P320-P403+P233-P405-P501
- Hazard Codes
- T+,F
- Risk Statements
- 26-34-67-65-63-48/20-11-39/26
- Safety Statements
- 9-26-36/37/39-45-62-28-16
- OEB
- C
- OEL
- TWA: 0.1 ppm (0.4 mg/m3), Ceiling: 0.2 ppm (0.8 mg/m3) [15-minute]
- RIDADR
- UN 3384 6.1/PG 1
- WGK Germany
- 2
- RTECS
- SY5600000
- F
- 3-21
- DOT Classification
- 2.3, Hazard Zone A (Gas poisonous by inhalation)
- HazardClass
- 2.3
- HS Code
- 28121030
- Toxicity
- LC50 inhal (rat) 341 ppm (1364 mg/m3; 30 min)
PEL (OSHA) 0.1 ppm (0.4 mg/m3)
TLV-TWA (ACGIH) 0.1 ppm (0.4 mg/m3)
- IDLA
- 2 ppm
Use
Phosgene can be deadly at a concentration as low as 2 ppm. Phosgene is used as an intermediate in the manufacture of many industrial chemicals, including dyes and plastics; in the making of dyestuffs based on triphenylmethane, coal tar, and urea. It is also used in the organic synthesis of isocyanates and their derivatives, carbonic acid esters (polycarbonates); and acid chlorides. Other applications include its utilization in metallurgy; and in the manufacture of some insecticides and pharmaceuticals. Exposure to phosgene may occur during arc welding and in fires involving vinyl chloride; released from household paint removers and degreasers when they are used in the presence of heat. Phosgene (CG) has been used as a military choking, pulmonary agent since WW I, and has become a staple of chemical arsenals in many countries
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