# NIOSH Pocket Guide to Chemical Hazards
Phosphorus pentasulfide | CAS 1314-80-3
P2S5/P4S10 | RTECS TH4375000
Synonyms & Trade Names Phosphorus persulfide, Phosphorus sulfide, Sulfur phosphide | DOT ID & Guide 1340 139
Exposure Limits | NIOSH REL: TWA 1 mg/m3 ST 3 mg/m3
OSHA PEL†: TWA 1 mg/m3
IDLH 250 mg/m3 | Conversion
Physical Description Greenish-gray to yellow, crystalline solid with an odor of rotten eggs.
MW: 222.3/444.6 | BP: 957°F | MLT: 550°F | Sol: Reacts
VP(572°F): 1 mmHg | IP: ? |  | Sp.Gr: 2.09
Fl.P: ? | UEL: ? | LEL: ? |
Flammable Solid, which may SPONTANEOUSLY ignite in presence of moisture.
Incompatibilities & Reactivities Water, alcohols, strong oxidizers, acids, alkalis [Note: Reacts with water to form hydrogen sulfide, sulfur dioxide, and phosphoric acid.]
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: Daily | First Aid (See procedures) Eye: Irrigate immediately Skin: Dust off solid; water flush 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 250 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 canister providing protection against the compound of concern and 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; apnea, coma, convulsions; conjunctivitis pain, lacrimation (discharge of tears), photophobia (abnormal visual intolerance to light), kerato-conjunctivity, corneal vesiculation; dizziness; headache; lassitude (weakness, exhaustion); irritability, insomnia; gastrointestinal disturbance
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION