PHOSGENE (CARBONYL CHLORIDE)†

Chemical Identification
Chemical Identification
CAS # 75-44-5
Formula
 

CCl₂O

Synonyms
 

carbon oxychloride; carbonyl chloride; carbonyl dichloride; chloroformyl chloride

Physical Properties
Physical Properties
Physical description Colorless gas with a suffocating odor like musty hay.
Boiling point 47°F Molecular weight 98.9
Freezing point/melting point -180°F Vapor pressure 1.6 atm
Flash point Vapor density 3.48
Specific gravity 1.43 (liquid at 32°F) Ionization potential 11.55 eV
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 4 NFPA fire rating 0
NFPA reactivity rating 1 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 2070
Sampling group
Sampler/Sampling media XAD-2 tube (150/75 mg) coated with 10% 2-(hydroxymethyl)piperidine [SKC 226-117]
Sampling time*
 

240 min

Sampling volume (TWA)*
 

240 L

Sampling flow rate (TWA)*
 

1 L/min

Sampling volume (STEL/Peak/C)*
 

15 L

Sampling flow rate (STEL/Peak/C)*
 

1 L/min

Analytical method instruments GC-NPD
Method reference OSHA 61 (fully validated)
Notes
 

When relative humidity at sampling site is low, reduce maximum sample size to 120 Liters and sampling rate to 0.5 L/min.

Special requirements
 

 

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
 

 

Bulk Method
Bulk Method
 

 

On-Site Screening Techniques
On-Site Screening Techniques
Device Detector tube Detector tube Detector tube Detector tube Detector tube CMS Chip
Model/Type Dräger - Phosgene 0.02/a, 8101521 Dräger - Phosgene 0.25/a, CH19401 Dräger - Phosgene 0.25/c, CH28301 Gastec 16 Matheson-Kitagawa 8014-146S Phosgene, 0.05-2 ppm range
Sampling information
(see manufacturer instructions)
20 or 40 strokes, approx 0.01-1 ppm range, uncertainty 16% 1-33 strokes, approx 0.04-1.5 ppm, uncertainty 32% 5 strokes, approx 0.1-5 ppm range, uncertainty 25% 1-10 strokes, 0.01-20 ppm range, uncertainty 16% for 0.1-1 ppm, 8% for 1-5 ppm follow mfr instructions, approx 0.1-20 ppm range
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA
 

0.1 ppm (0.4 mg/m³)

REL-TWA
 

0.1 ppm (0.4 mg/m³)

TLV-TWA
 

0.1 ppm [1992]

PEL-TWA
 

0.1 ppm (0.4 mg/m³)

PEL-STEL
 

 

REL-STEL
 

 

TLV-STEL
 

 

PEL-STEL
 

 

PEL-C
 

 

REL-C
 

0.2 ppm (0.8 mg/m³) [15 minutes]

TLV-C
 

 

PEL-C
 

 

Skin notation
 

N

Skin notation
 

N

Skin notation
 

N

Skin notation
 

N

Notes:
 

See 29 CFR 1910.1000 Table Z-1.

Notes:
 

 

Notes:
 

 

Notes:
 

 

Health factors:  See NIH-NLM PubChem. IDLH

2 ppm

Carcinogenic classifications: EPA-II Notes:
 

 

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 

--/0.5 ppm/1.5 ppm

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Phosgene

NIOSH: Pocket Guide to Chemical Hazards - Phosgene

Literature References

 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Phosgene. See annual publication for most recent information.

Last Updated Date : 01/29/2021