NIOSH Pocket Guide to Chemical Hazards

Phosphorus oxychloride

CAS 10025-87-3


RTECS TH4897000
Synonyms & Trade Names
Phosphorus chloride, Phosphorus oxytrichloride, Phosphoryl chloride
DOT ID & Guide
1810 137


NIOSH REL: TWA 0.1 ppm (0.6 mg/m3) ST 0.5 ppm (3 mg/m3)
OSHA PEL†: none
IDLH N.D. See: IDLH INDEX Conversion 1 ppm = 6.27 mg/m3
Physical Description
Clear, colorless to yellow, oily liquid with a pungent & musty odor. [Note: A solid below 34°F.]
MW: 153.3
BP: 222°F
FRZ: 34°F
Sol: Decomposes
VP(81°F): 40 mmHg
IP: ?

Sp.Gr(77°F): 1.65
Fl.P: NA

Noncombustible Liquid, but may set fire to combustible materials.
Incompatibilities & Reactivities
Water, combustible materials, carbon disulfide, dimethyl-formamide, metals (except nickel & lead) [Note: Decomposes in water to hydrochloric & phosphoric acids.]
Measurement Methods
None available
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation
Provide: Eyewash, Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations Not available.
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, respiratory system; eye, skin burns; dyspnea (breathing difficulty), cough, pulmonary edema; dizziness, headache, lassitude (weakness, exhaustion); abdominal pain, nausea, vomiting; nephritis
Target Organs Eyes, skin, respiratory system, central nervous system, kidneys
See also: INTRODUCTION   See ICSC CARD: 0190