PHOSPHORUS TRICHLORIDE†

Chemical Identification
CAS # 7719-12-2
Formula

PCl₃

Synonyms

phosphorus chloride

Physical Properties
Physical description Colorless to yellow, fuming liquid with an odor like hydrochloric acid.
Boiling point 169°F Molecular weight 137.35
Freezing point/melting point -170°F Vapor pressure 100 mmHg at 69.8°F
Flash point Vapor density 4.75
Specific gravity 1.58 Ionization potential 9.91 eV
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 4 NFPA fire rating 0
NFPA reactivity rating 2 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 2093
Sampling group
Sampler/Sampling media Midget fritted glass bubbler (MFGB) containing 15 mL Distilled Water [Infrequently Requested Method - OSHA staff please contact SLTC before sampling 801-233-5100]
Sampling time*
Sampling volume (TWA)*

11-100 L

Sampling flow rate (TWA)*

0.05-0.2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments UV-VIS
Method reference NIOSH 6402 (partially validated)
Notes

Ship in sealed bubblers.

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
Sampler/Sampling media
Bulk Method
Bulk Method
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
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

0.5 ppm (3 mg/m³)

REL-TWA

0.2 ppm (1.5 mg/m³)

TLV-TWA

0.2 ppm [1992]

PEL-TWA

0.2 ppm (1.5 mg/m³)

PEL-STEL REL-STEL

0.5 ppm (3 mg/m³)

TLV-STEL

0.5 ppm [1992]

PEL-STEL

0.5 ppm (3 mg/m³)

PEL-C REL-C 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

25 ppm

Carcinogenic classifications: Not listed Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

0.5 ppm/3 ppm/15 ppm

Last Updated Date : 01/22/2024