# NIOSH Pocket Guide to Chemical Hazards
Phosphorus oxychloride | CAS 10025-87-3
POCl3 | RTECS TH4897000
Synonyms & Trade Names Phosphorus chloride, Phosphorus oxytrichloride, Phosphoryl chloride | DOT ID & Guide 1810 137
Exposure Limits | NIOSH REL: TWA 0.1 ppm (0.6 mg/m3) ST 0.5 ppm (3 mg/m3)
OSHA PEL†: none
IDLH N.D. | 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 | UEL: NA | LEL: 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
Personal Protection & Sanitation 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
Respirator Recommendations To be added later
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