PHOSGENE (CARBONYL CHLORIDE)†
CAS # | 75-44-5 |
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Formula |
CCl₂O |
Synonyms |
carbon oxychloride; carbonyl chloride; carbonyl dichloride; chloroformyl chloride |
Physical description | Colorless gas with a suffocating odor like musty hay. | ||
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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 |
Analyte code (IMIS no.) | 2070 | ||
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Sampling group | |||
Sampler/Sampling media | XAD-2 tube (150/75 mg) coated with 10% 2-(hydroxymethyl)piperidine [SKC 226-117] | ||
Sampling time* | 240 min |
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Sampling volume (TWA)* | 240 L |
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Sampling flow rate (TWA)* | 1 L/min |
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Sampling volume (STEL/Peak/C)* | 15 L |
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Sampling flow rate (STEL/Peak/C)* | 1 L/min |
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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. |
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Special requirements |
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* 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 Sampler/Sampling media |
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Bulk Method |
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Device | Detector tube | Detector tube | Detector tube | Detector tube | Detector tube | CMS Chip |
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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 |
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 |
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PEL-TWA |
0.1 ppm (0.4 mg/m³) |
REL-TWA |
0.1 ppm (0.4 mg/m³) |
TLV-TWA | PEL-TWA |
0.1 ppm (0.4 mg/m³) |
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PEL-STEL |
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REL-STEL |
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TLV-STEL |
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PEL-STEL |
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PEL-C |
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REL-C |
0.2 ppm (0.8 mg/m³) [15 minutes] |
TLV-C |
0.02 ppm [2021] |
PEL-C |
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Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Notes: |
Notes:
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Notes:
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Notes:
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Health factors: See NIH-NLM PubChem. | IDLH |
2 ppm |
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Carcinogenic classifications: EPA-II |
Notes:
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AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
--/0.5 ppm/1.5 ppm |
Additional Resources and Literature References
NOAA: CAMEO Chemicals - Phosgene NIOSH: Pocket Guide to Chemical Hazards - Phosgene Literature References
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Last Updated Date : 01/29/2021