Product Name: Tetrakis(hydroxymethyl) Phosphonium Sulfate
Chemical Formula: C8H24O12P2S
CAS Number: 55566-30-8
Synonyms: THPS, Phosphonium sulfate, Tetrakis(hydroxymethyl)phosphonium sulfate
Intended Use: Biocide, water treatment chemical, textile flame retardant
Supplier/Manufacturer: Refer to product label or delivery documentation for supplier contact details
Emergency Phone Number: Local emergency services or Poison Control Center
Date of Issue: Check most recent product documentation for date
GHS Classification: Skin Corrosive Category 1B, Eye Damage Category 1, Acute Toxicity Oral Category 4, Aquatic Acute Category 1
Signal Word: Danger
Hazard Statements: Causes severe skin burns and eye damage; harmful if swallowed; very toxic to aquatic life
Pictograms: Corrosion, Exclamation mark, Environment
Precautionary Statements: Avoid breathing mist or vapors; wash hands thoroughly after handling; wear protective gloves, protective clothing, eye protection, face protection; avoid release to environment
Routes of Exposure: Inhalation, ingestion, skin contact, eye contact
Acute Symptoms: Burning sensation, pain, redness, ulceration, permanent eye damage
Chronic Effects: May cause respiratory irritation with prolonged exposure; repeated contact can lead to dermatitis
Chemical Name: Tetrakis(hydroxymethyl) Phosphonium Sulfate
Common Name: THPS
Concentration: Typically 75% (commercial solutions may differ; balance is water)
CAS Number: 55566-30-8
Impurities: Water, trace formaldehyde, trace phosphorus oxides
Molecular Weight: 406.37 g/mol
EINECS Number: 259-709-0
Inhalation: Remove person to fresh air; keep at rest; seek medical advice for persistent symptoms
Skin Contact: Remove contaminated clothing and rinse skin with water for at least 15 minutes; get medical attention
Eye Contact: Rinse cautiously with water for at least 15 minutes; remove contact lenses; get immediate medical help
Ingestion: Rinse mouth with water; do not induce vomiting; seek immediate medical assistance
Note to Physician: Treat as corrosive; monitor for respiratory symptoms and possible aspiration
Most Important Symptoms: Severe burning, ulceration, risk of permanent tissue damage
Suitable Extinguishing Media: Carbon dioxide, foam, dry chemical powder, water spray
Unsuitable Media: Direct water jet
Specific Hazards: Emits toxic gases including phosphine, sulfur oxides, carbon oxides under fire conditions
Protective Equipment: Chemical resistant suit, self-contained breathing apparatus
Special Procedures: Avoid runoff entering drains or waterways; cool containers with water spray to prevent explosion
Personal Precautions: Evacuate area; use personal protective equipment; avoid contact with skin and eyes
Environmental Precautions: Prevent further leakage or spillage; do not allow to enter drains, rivers or soil
Spill Cleanup Methods: Absorb with inert material (sand, earth, vermiculite), collect in closed containers for disposal; ventilate area
Decontamination: Wash spill area with water and detergent after material pick up
Notification Procedures: Report significant spills to local authorities as required
Handling: Work in well-ventilated areas; avoid inhalation, ingestion, and skin/eye contact; wear recommended PPE; ensure eyewash stations and safety showers are readily available
Storage Conditions: Store in a cool, dry, well-ventilated place; keep containers tightly closed; store away from incompatible materials (bases, oxidizers)
Storage Temperature: Keep below 25°C whenever possible
Incompatibilities: Strong bases, strong oxidizing agents, strong acids
Recommended Packaging: Corrosion-resistant containers with acid-resistant lining
Exposure Limits: No established occupational exposure limit; minimize exposure on the job
Engineering Controls: Use local exhaust or general ventilation
Personal Protective Equipment: Chemical resistant gloves (nitrile or butyl), splash-proof goggles, face shield, chemical-resistant apron, boots
Respiratory Protection: Use an approved respirator if vapor/mist generation is likely
Hygiene Measures: Wash hands and exposed skin thoroughly after handling; refrain from eating, drinking, or smoking in work areas
Appearance: Colorless to pale-yellow liquid
Odor: Slight, non-specific odor
pH: Acidic, typically around 3-5
Boiling Point: Approximately 105°C (solution)
Melting Point: Not applicable (liquid at room temperature)
Flash Point: Not flammable
Solubility in Water: Complete
Vapor Pressure: Low at ambient temperature
Density: About 1.3 g/cm³ (at 20°C)
Viscosity: Slightly higher than water
Auto-ignition Temperature: Not self-igniting
Decomposition Temperature: Decomposes above 200°C
Chemical Stability: Stable under recommended storage and handling conditions
Hazardous Reactions: May react with oxidizers, strong bases, and reducing agents
Condition to Avoid: Avoid heat, open flames, direct sunlight, and incompatible chemicals
Hazardous Decomposition Products: Phosphine gas, sulfur oxides, carbon oxides
Polymerization: Will not occur
Acute Oral Toxicity: LD50 (rat) approximately 600 mg/kg
Acute Dermal Toxicity: LD50 (rabbit) above 2000 mg/kg
Acute Inhalation Toxicity: No data available for inhalation route
Skin Corrosion/Irritation: Causes severe burns
Eye Damage/Irritation: Causes permanent damage with potential for blindness
Respiratory Sensitization: Possible irritant
Long-term (Chronic) Effects: Prolonged exposure may lead to dermatitis, respiratory discomfort
Carcinogenicity: Not classified as carcinogenic by IARC, OSHA, or NTP
Mutagenicity: No evidence of mutagenicity
Reproductive Toxicity: Not classified
Ecotoxicity: Highly toxic to aquatic organisms including fish and invertebrates
Aquatic Toxicity Data: LC50 (fish, 96 hours) < 1 mg/L; EC50 (Daphnia, 48 hours) < 1 mg/L
Persistence and Degradability: Readily biodegradable under aerobic conditions
Bioaccumulative Potential: Low potential for bioaccumulation
Mobility in Soil: High mobility due to water solubility
Other Adverse Effects: May disrupt aquatic environments through toxicity
Disposal Methods: Dispose of in accordance with local, regional, national, and international regulations
Water Disposal: Do not discharge to surface water, storm drains, or groundwater
Container Disposal: Rinse empty containers thoroughly and handle as hazardous waste
Recommended Treatment: Incineration under controlled conditions or approved chemical waste treatment facility
Precautions: Avoid any unauthorized release to the environment during disposal
UN Number: 2922
Proper Shipping Name: Corrosive Liquid, Toxic, N.O.S. (Contains Tetrakis(hydroxymethyl) Phosphonium Sulfate)
Transport Hazard Class: 8 (Corrosive), 6.1 (Toxic substances)
Packing Group: II
Marine Pollutant: Yes
Labels Required: Corrosive, Toxic, Environmentally Hazardous Substance
Special Transport Precautions: Protect from physical damage; keep separated from incompatible materials; emergency response guide required
OSHA: Classified as hazardous; requires hazard communication standard compliance
TSCA Inventory: Listed
EU REACH: Registered; subject to specific restrictions and requirements
WHMIS Status (Canada): Classified as D1B (Toxic) and E (Corrosive)
SARA Title III: Not subject to Section 313 reporting, but subject to general emergency planning
Other Regulations: Subject to requirements under the Clean Water Act, Clean Air Act, and global chemical inventories
