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Chemical Sampling Information (CSI)
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General Description

Synonyms: Phosphorus chloride

OSHA IMIS Code Number: 2093

Chemical Abstracts Service (CAS) Registry Number: 7719-12-2

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: TH3675000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1809 137

NIOSH Pocket Guide to Chemical Hazards, Phosphorus Trichloride: chemical description, physical properties, potentially hazardous incompatibilities, and more

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 29 CFR 1910.1000 Z-1 Table -- 0.5 ppm, 3 mg/m3 TWA

Construction Industry: 29 CFR 1926.55 Appendix A -- 0.5 ppm, 3 mg/m3 TWA

Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 0.5 ppm, 3 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.2 ppm, 1.1 mg/m3 TWA; 0.5 ppm, 2.8 mg/m3 STEL

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.2 ppm, 1.5 mg/m3 TWA; 0.5 ppm, 3 mg/m3 STEL

Health Factors

NIOSH Immediately Dangerous To Life or Health Concentration (IDLH): 25 ppm

Potential Symptoms: Irritation of eyes, skin, nose, throat; pulmonary edema (may be delayed); eye, skin burns; headache, dizziness; cough, bronchitis, pneumonia; sore throat; lachrymation; loss of vision; nausea, vomiting; INGES ACUTE: Abdominal pain; burning sensation; shock or collapse.

Health Effects: Irritation-Eye, Nose, Throat, Skin---Marked (HE14) Bronchial Pneumonia (HE10); Pulmonary edema (HE11)

Affected Organs: Respiratory system, eyes, skin

Notes: Can react violently with fire extinguishing or spill dispersing agents containing water. Reaction with water produces phosphoric acid, hydrochloric acid and phosphorus oxides.

Literature Basis:

  • NIOSH Pocket Guide to Chemical Hazards: Phosphorus trichloride.
  • International Chemical Safety Cards (WHO/IPCS/ILO): Phosphorus trichloride.
  • Kapias, T. and Griffiths, R.F.: Spill behavior using REACTPOOL. Part III. Results for accidental releases of phosphorus trichloride (PCl(3)) and oxychloride (POCl (3)) and general discussion. J. Hazard. Mater. 81(3): 223-249, 2001.

Date Last Revised: 07/21/2004

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Midget Fritted Glass Bubbler (MFGB) containing 15 mL Deionized Water
    maximum volume: 100 Liters
    maximum flow rate: 0.2 L/min (TWA)
    maximum volume: 3 Liters
    maximum flow rate: 0.2 L/min (STEL)
    current analytical method: Colorimetric
    method reference: (NIOSH 6402 [24 KB PDF, 4 pages])
    method classification: Fully Validated
    note: Submit as a separate sample.

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