# NIOSH Pocket Guide to Chemical Hazards
Phosphorus pentachloride | CAS 10026-13-8
PCl5 | RTECS TB6125000
Synonyms & Trade Names Pentachlorophosphorus, Phosphoric chloride, Phosphorus perchloride | DOT ID & Guide 1806 137
Exposure Limits | NIOSH REL: TWA 1 mg/m3
OSHA PEL: TWA 1 mg/m3
IDLH 70 mg/m3 | Conversion
Physical Description White to pale-yellow, crystalline solid with a pungent, unpleasant odor.
MW: 208.3 | BP: Sublimes | MLT: 324°F (Sublimes) | Sol: Reacts
VP(132°F): 1 mmHg | IP: ? |  | Sp.Gr: 3.60
Fl.P: NA | UEL: NA | LEL: NA |
Noncombustible Solid
Incompatibilities & Reactivities Water, magnesium oxide, chemically-active metals such as sodium & potassium, alkalis, amines [Note: Hydrolyzes in water (even in humid air) to form hydrochloric acid & phosphoric acid. Corrosive to metals.]
Measurement Methods NIOSH S257 (II-5)
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: Daily Provide: Eyewash, Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA Up to 10 mg/m3: (APF = 10) Any supplied-air respirator* Up to 25 mg/m3: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode* Up to 50 mg/m3: (APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Up to 70 mg/m3: (APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, respiratory system; bronchitis; dermatitis
Target Organs Eyes, skin, respiratory system
See also: INTRODUCTION