1. OSHA Occupational Chemical Database
  2. PHOSPHORUS OXYCHLORIDE
Label abbreviations descriptions

PHOSPHORUS OXYCHLORIDE

Chemical Identification
Chemical Identification
CAS # 10025-87-3
Formula

Cl₃OP
Synonyms

phosphorus chloride; phosphorus oxytrichloride; phosphoryl chloride
Physical Properties
Physical Properties
Physical description Clear, colorless to yellow, oily liquid with a pungent & musty odor.
Boiling point 223°F Molecular weight 153.32
Freezing point/melting point 34.2°F Vapor pressure 40 mmHg at 81.14°F
Flash point Vapor density 5.3
Specific gravity 1.645 at 77°F Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 4 NFPA fire rating 0
NFPA reactivity rating 2 NFPA special instruction W: Reacts violently or explosively with water.
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.)
Sampling group
Sampler/Sampling media
Sampling time*
Sampling volume (TWA)*
Sampling flow rate (TWA)*
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments
Method reference
Notes
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
Model/Type
Sampling information
(see manufacturer instructions)
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 REL-TWA
 

0.1 ppm (0.6 mg/m³)

 TLV-TWA
 

0.1 ppm [1979]

 PEL-TWA
 

0.1 ppm (0.6 mg/m³)
PEL-STEL REL-STEL
 

0.5 ppm (3 mg/m³)

 TLV-STEL
 

 

 PEL-STEL
 

 
PEL-C
 

 

 REL-C
 

 

 TLV-C
 

 

 PEL-C
 

 
Skin notation
 

NA

 Skin notation
 

N

 Skin notation
 

N

 Skin notation
 

N
Notes:
 

Not established

 Notes:
 

 

 Notes:
 

 

 Notes:
 

 
Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: Notes:
 

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

 
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Phosphorus oxychloride

NIOSH: Pocket Guide to Chemical Hazards - Phosphorus oxychloride

Literature References

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

Last Updated Date : 01/08/2021