Material Safety Data Sheet: Phosphorus Pentasulfide

Identification

Product Name: Phosphorus Pentasulfide
Chemical Formula: P₂S₅
Synonyms: Tetraphosphorus Decasulfide, Phosphoric Sulfide
CAS Number: 1314-80-3
Recommended Use: Used in lubricant additives, production of pesticides, flotation agents, and chemical manufacturing
Supplier Identifiers: Supplier details and emergency contact information are found on the transport packaging or invoice; refer to chemical procurement documentation for updates

Hazard Identification

GHS Classification: Flammable solid; Acute toxicity (oral and inhalation); Skin and eye irritant; Hazardous to aquatic life
Label Elements: Pictograms include flame, skull and crossbones, exclamation mark, and aquatic hazard symbol
Signal Word: Danger
Hazard Statements: Highly flammable, produces toxic fumes on contact with water or acids, can cause severe irritation to skin, eyes, and respiratory system, dangerous to aquatic organisms with long-lasting effects

Composition / Information on Ingredients

Chemical Name: Phosphorus Pentasulfide
Common Names: Phosphoric Sulfide, Tetraphosphorus Decasulfide
Concentration: 98% or greater by weight
Impurities: Minor amounts of phosphorus trisulfide may be present
Molecular Weight: 222.27 g/mol

First Aid Measures

Inhalation: Move person away from exposure. Seek medical attention immediately if there is any difficulty breathing. Administer oxygen if breathing is difficult. Remove contaminated clothing.
Skin Contact: Wash thoroughly with soap and water for at least 15 minutes. Remove contaminated clothing and shoes. Seek medical advice for burns, irritation, or persistent pain.
Eye Contact: Rinse with plenty of water for several minutes; keep eyelids open and move eye back and forth while rinsing. Remove contact lenses if present and easy to do. Seek urgent medical care.
Ingestion: Rinse mouth with water without swallowing. Do not induce vomiting. Give water to dilute chemical if victim is conscious. Seek immediate medical attention.
Note to Physicians: Treat symptomatically, paying attention to possible respiratory distress from inhaling toxic fumes.

Fire-Fighting Measures

Suitable Extinguishing Media: Use dry chemical or sand. Do not use water, foam, or carbon dioxide—may react violently or cause hazardous gases.
Fire Hazards: Reacts with water and moist air to produce toxic phosphine and hydrogen sulfide gas, both highly flammable and poisonous. Can self-ignite in humid air.
Protective Equipment for Firefighters: Full protective gear including SCBA (self-contained breathing apparatus). Avoid downwind exposure due to release of dense toxic smoke.
Firefighting Precautions: Fight fire from a safe distance or protected location. Evacuate area and keep unauthorized personnel away.
Thermal Decomposition: Releases sulfur oxides and phosphorus oxides when burned.

Accidental Release Measures

Personal Precautions: Warn everyone to avoid the spill area. Wear full protective gear (chemical-resistant clothing, gloves, goggles, and a respirator suitable for phosphine exposure). Evacuate all non-essential personnel.
Environmental Precautions: Prevent spill from reaching drains, sewers, rivers, or soil. Report unintended environmental releases to responsible authorities.
Spill Cleanup:** Shovel spilled solid into dry, clean, labeled containers. Avoid water during cleanup. Place waste in covered containers for proper disposal. Ventilate area and monitor for gas buildup.
Decontamination Methods: Wash spill area with soda ash or lime after removal of solid, avoid generating dust or mist.