© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Chemical Name: Bis(Tributyltin) Oxide
Common Synonym: TBTO
Chemical Formula: C24H54OSn2
CAS Number: 56-35-9
Appearance: Pale yellow, clear to slightly hazy liquid
Odor: Slight, characteristic
Main Uses: Wood preservation, antifouling paint component, industrial biocide
Key Hazards: Severe eye and skin irritation, toxic by inhalation and ingestion, possible reproductive toxicity, hazardous to aquatic life
Health Risk: Can cause central nervous system effects, headaches, nausea, abdominal pain, possible liver and kidney damage on long-term exposure
Environment: Highly toxic to aquatic organisms, risk of long-lasting effects in aquatic environment
Main Component: Bis(Tributyltin) Oxide (>95%)
Impurities: Trace amounts of related organotin compounds
Substance Type: Single hazardous chemical
Inhalation: Move to fresh air, seek medical attention if symptoms like dizziness or headache appear
Skin Contact: Remove contaminated clothing, wash affected area with soap and water
Eye Contact: Rinse gently with lukewarm water for at least 15 minutes, medical help required for irritation
Ingestion: Do not induce vomiting, rinse mouth, seek urgent medical attention
Suitable Extinguishing Media: Dry chemical, CO2, alcohol-resistant foam
Specific Hazards: May produce toxic and irritating fumes, including tin oxides
Protective Equipment: Wear self-contained breathing apparatus and full body suit
Explosion Risk: Not classified as explosive, though combustion products are a concern
Personal Protection: Avoid contact with skin or eyes, wear gloves and protective goggles
Spill Cleanup: Absorb with inert material, collect for disposal in sealed container
Environmental Precaution: Prevent entry into waterways, drains or soil due to high toxicity
Handling: Work in well-ventilated space, use proper personal protection, avoid generating aerosols
Storage: Keep container tightly closed, store in cool, dry, well-ventilated area away from acids and oxidizers
Special Advice: Never eat, drink, or smoke in storage and handling areas, wash hands after use
Engineering Controls: Use local exhaust ventilation
Respiratory Protection: Wear appropriate respirator for airborne concentration
Skin Protection: Chemical-resistant gloves and protective clothing
Eye Protection: Safety goggles
Hygiene Measures: Wash hands and exposed areas thoroughly after handling, remove contaminated clothing
Physical State: Liquid
Color: Yellowish
Boiling Point: Around 180°C at reduced pressure
Melting Point: -45°C
Vapor Pressure: Low
Solubility: Insoluble in water, soluble in organic solvents
Density: Approximately 1.2 g/cm3 at 20°C
Flash Point: Above 110°C
Chemical Stability: Stable under normal conditions
Incompatible Materials: Strong acids, oxidizers, some metals
Hazardous Decomposition Products: Produces toxic fumes such as tin oxides on decomposition
Polymerization: Not known to occur
Acute Toxicity: Harmful or fatal if swallowed or inhaled; LD50 (oral, rat): estimated in range of 25-270 mg/kg
Irritation: Severe irritant to eyes and skin
Chronic Toxicity: Possible reproductive toxicity, liver and kidney effects with prolonged exposure
Sensitization: May cause allergic skin reaction
Cancer Risk: Not classified as carcinogenic by main agencies, but long-term impacts not fully clear
Aquatic Toxicity: Extremely toxic to fish, daphnia, and algae even at low concentrations
Bioaccumulation: Can build up in aquatic organisms, persistence in sediments
Mobility in Soil: Low water solubility but strong environmental persistence
Degradation: Degrades slowly in environment, potential for long-term pollution
Disposal Method: Treat as hazardous waste, incinerate at specialized facility
Do Not: Discharge to sewer, waterways, or uncontrolled landfill
Packaging Disposal: Ensure containers are completely empty, triple rinsed before disposal or recycling
UN Number: UN 3020 (Organic Tin Compound, Liquid, Toxic, NOS)
Transport Hazard Class: 6.1 (Toxic Substances)
Packing Group: II
Special Transport Note: Avoid heat, shock, and rough handling during transport
Occupational Exposure Limits: Strict regulations in major industrial countries
Environmental Restrictions: Banned or restricted for use in marine paints in many regions due to toxicity
Worker Safety: Subject to chemical safety laws with mandatory use of PPE and controls
