Product Name: Phosphorus Trichloride
Synonyms: Trichlorophosphine, Phosphortrichlorid
Chemical Formula: PCl3
CAS Number: 7719-12-2
Recommended Use: Used for manufacturing phosphorus compounds, pesticides, plasticizers, and flame retardants
Manufacturer: Provided by the supplier on request
Contact Information: Emergency contact and supplier details available from purchase documents
Emergency Phone: CHEMTREC: 1-800-424-9300 (USA)
Classification: Acute Toxicity (Inhalation, Oral), Skin Corrosion, Serious Eye Damage
Signal Word: Danger
Hazard Pictograms: Skull and Crossbones, Corrosive
Precautionary Statements: Avoid breathing vapors, wear protective clothing, wash hands thoroughly after handling
Potential Health Effects: Severe burns to eyes, skin, and respiratory tract; possible fatal if inhaled or ingested; rapid onset of symptoms
Routes of Exposure: Inhalation, skin, eyes, ingestion
Environmental Hazards: Causes severe aquatic toxicity; persistent and mobile in environment
Chemical Identity: Phosphorus Trichloride
Concentration: >99% by weight
Impurities: Trace amounts of phosphorus oxychloride possible
CAS Number: 7719-12-2
EC Number: 231-749-3
Inhalation: Remove to fresh air immediately; provide oxygen or artificial respiration if breathing is difficult; obtain medical attention promptly
Skin Contact: Rinse skin with large amounts of water for at least 15 minutes and remove contaminated clothing; seek medical attention immediately
Eye Contact: Rinse eyes under gentle stream of water for at least 15 minutes, ensuring eyelids are held open; seek medical attention immediately
Ingestion: Do not induce vomiting; rinse mouth and give water only if conscious; seek immediate medical aid
Symptoms: Burning sensation; coughing; choking; irritation and burns to tissue
Immediate Medical Attention: Required for any exposure, do not delay
Suitable Extinguishing Media: Dry chemical powder and carbon dioxide; avoid water if not absolutely necessary
Unsuitable Media: Water spray may cause violent reaction emitting hydrogen chloride gas
Specific Hazards: Releases toxic fumes of hydrogen chloride and phosphorus oxides when heated or on contact with water
Protective Equipment: Evacuate area, wear full chemical protective suit with self-contained breathing apparatus
Firefighting Instructions: Keep containers cool by spraying with water from safe distance; do not allow runoff to sewers
Personal Precautions: Evacuate unnecessary personnel; provide adequate ventilation; wear protective clothing including gloves, goggles, face shield, and respirator
Environmental Precautions: Contain spillage to prevent entry into waterways, soil, or drains
Cleanup Methods: Neutralize residue with sodium bicarbonate or absorb using inert, dry non-combustible material (such as sand or vermiculite), then collect into sealed chemical waste containers for disposal
Decontamination: Thoroughly ventilate and wash contaminated surfaces after cleanup
Safe Handling Practices: Use only in well-ventilated, designated chemical fume hood; do not breathe vapors or allow contact with skin and eyes; avoid generating or breathing dust or fumes; handle with chemical-resistant gloves and splash-resistant goggles
Storage Conditions: Store in tightly closed, corrosion-resistant containers; keep away from water, acids, bases, and sources of moisture or humidity
Incompatible Materials: Contact with water, alcohols, and strong bases or oxidizing agents causes violent reaction
Storage Area: Keep in cool, dry, well-ventilated place secured from unauthorized personnel or children
Additional Precautions: Ensure emergency eyewash and shower stations are nearby
Occupational Exposure Limits: OSHA TWA: 0.5 ppm, ACGIH TLV: 0.2 ppm
Engineering Controls: Mechanical exhaust, process enclosure, and emergency ventilation recommended
Personal Protection: Chemical splash goggles, face shield, rubber gloves, full protective suit, and approved respirator if ventilation is inadequate
Hygienic Practices: Wash hands, forearms, and face after handling; remove contaminated clothing and wash before reuse
Monitoring Methods: Airborne concentration monitoring for workplace compliance; periodic medical checks for exposed workers
Appearance: Colorless to pale yellow fuming liquid
Odor: Pungent, irritating
Melting Point: -93.6°C
Boiling Point: 76.1°C
Flash Point: Not applicable, non-combustible
Relative Density: 1.574 at 25°C
Solubility: Reacts violently with water, soluble in organic solvents
Vapor Pressure: 13 mmHg at 20°C
Vapor Density: 4.6 (air = 1)
Evaporation Rate: Rapid under ambient conditions
pH: Not applicable (hydrolyzes)
Partition Coefficient (n-octanol/water): Not available
Autoignition Temperature: Not flammable
Chemical Stability: Keeps in tightly sealed containers under dry, inert atmosphere
Conditions to Avoid: Moisture, water vapor, open flames, and high temperatures
Incompatible Materials: Water, moisture, strong alkalis, alcohols, oxidizers, amines
Decomposition Products: Releases hydrogen chloride and phosphorus oxides when decomposed
Hazardous Reactions: Violent reaction with water, exothermic and releases toxic gases
Acute Toxicity: LC50 (inhalation, rat): 104 ppm/4h; LD50 (oral, rat): 25 mg/kg
Respiratory Effects: Severe irritation, chemical pneumonitis, pulmonary edema
Skin and Eye Effects: Severe burns, possible permanent eye damage or blindness
Chronic Effects: Nose and throat ulceration, respiratory tract inflammation, hyperplasia on repeated exposure
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, or OSHA
Mutagenicity and Reproductive Effects: Information lacking; handle with extra caution
Ecotoxicity: Highly toxic to aquatic organisms even at low concentrations
Persistence and Degradability: Hydrolyzes rapidly in water to phosphorus acid and hydrochloric acid, which can acidify water bodies
Bioaccumulative Potential: Not expected to bioaccumulate significantly due to rapid reactivity
Mobility in Soil: Leaches to water and reacts; rapid transformation limits migration
Other Adverse Effects: Can cause severe local ecosystem imbalances by lowering pH and introducing toxic ions
Disposal Methods: Consult local, regional, and national regulations for approved chemical waste disposal; consult hazardous waste specialists for incineration or chemical neutralization
Contaminated Packaging: Decontaminate unopened containers before recycling; consult regulations and hazardous waste expert
Special Precautions: Do not allow release to environment; label all hazardous waste for trained personnel only
Waste Handling: Absorb small spills on dry, inert material and transfer to waste containers; have compatible neutralizing agent ready on site
UN Number: UN 1809
UN Proper Shipping Name: Phosphorus Trichloride
Transport Hazard Class: 6.1 (Toxic substances), 8 (Corrosive substances)
Packing Group: I (Great danger)
Marine Pollutant: Yes
Special Transport Precautions: Keep containers tightly closed; segregate from foodstuffs, packing only in authorized, tightly sealed and corrosion-resistant containers; trained personnel only to handle during loading and unloading
Labeling: Toxic, Corrosive
OSHA Status: Classified hazardous under OSHA regulations
TSCA Inventory: Listed
SARA Title III (Sections 302/304/313): Extremely hazardous; subject to reporting requirements
RCRA Status: Hazardous waste, must comply with hazardous waste management requirements
State Regulations: Listed as hazardous in multiple US states; employer must train staff and provide access to safety procedures
International Inventories: Listed on EINECS, DSL, and other national chemical inventories
Other Regulations: Compliance with UN, DOT, and IMDG/IATA transport regulations mandatory
