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Phosphorus pentasulfide

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Synonyms & Trade Names
Phosphorus persulfide, Phosphorus sulfide, Sulfur phosphide
CAS No.
1314-80-3
RTECS No.
TH4375000
DOT ID & Guide
1340 139
Formula
P₂S₅/​P₄S₁₀
Conversion
IDLH
250 mg/m3
See: 1314803
Exposure Limits
NIOSH REL
TWA 1 mg/m3 ST 3 mg/m3
OSHA PEL
TWA 1 mg/m3 See Appendix G
Measurement Methods
None available
See: NMAM or OSHA Methods
Physical Description
Greenish-gray to yellow, crystalline solid with an odor of rotten eggs.
Molecular Weight
222.3 (P2S5)
444.6 (P4S10)
Boiling Point
957°F
Melting Point
550°F
Solubility
Reacts
Vapor Pressure
(572°F): 1 mmHg
Ionization Potential
?
Specific Gravity
2.09
Flash Point
?
Upper Explosive Limit
?
Lower Explosive Limit
?
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.]
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-conjunctivitis, corneal vesiculation; dizziness; headache; lassitude (weakness, exhaustion); irritability, insomnia; gastrointestinal disturbance
Target Organs
Eyes, skin, respiratory system, central nervous system
Personal Protection/Sanitation
(See protection codes)
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 an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 1407   MEDICAL TESTS: 0190
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health