Material Safety Data Sheet for Dibutyl Tin Oxide

Identification

Product Name: Dibutyl Tin Oxide
Chemical Formula: C8H18OSn
Synonyms: DBTO, Stannic Oxide, Dibutyltin Oxide
CAS Number: 818-08-6
Recommended Uses: Used as a catalyst in esterification, transesterification, polymerization, and as a stabilizer in PVC production
Supplier: [Supplier details, address, emergency phone number, email]

Hazard Identification

Classification: Harmful if inhaled, swallowed, or if contact with skin occurs; Irritant to eyes, respiratory tract, and skin
Signal Word: Warning
Hazard Statements: Causes serious eye and skin irritation; May damage fertility or the unborn child with prolonged exposure; Toxic to aquatic life
Pictograms: Health hazard, exclamation mark, environment
Precautionary Statements: Avoid breathing dust or fumes; Wear protective gloves, eye, and face protection; Prevent release to the environment; Wash thoroughly after handling

Composition / Information on Ingredients

Chemical Name: Dibutyl Tin Oxide
Content: 99% or higher
Impurities: Minor mixture of other organotin compounds, less than 1%
Formula: (C4H9)2SnO
Molecular Weight: 248.95 g/mol

First Aid Measures

Inhalation: Move affected person to fresh air immediately; monitor for difficulty breathing; provide oxygen, seek medical attention if symptoms develop
Skin Contact: Remove contaminated clothing; wash affected skin with soap and plenty of water; seek medical advice for persistent irritation
Eye Contact: Rinse eyes cautiously with water for at least 15 minutes; hold eyelids apart to ensure thorough flushing; consult medical personnel
Ingestion: Rinse mouth with water only if conscious; never induce vomiting; seek immediate medical help
Advice for Physicians: Treat by symptomatic and supportive methods, observe for chemical pneumonitis and lung edema

Fire-Fighting Measures

Suitable Extinguishing Media: Dry chemical, carbon dioxide, water spray, or foam; avoid high-pressure water jets
Specific Hazards: Releases toxic fumes of tin oxides, carbon oxides under fire conditions
Protective Equipment: Use self-contained breathing apparatus and full protective gear
Special Firefighting Procedures: Contain runoff, avoid contamination of water supplies, isolate fire area

Accidental Release Measures

Personal Precautions: Use personal protective equipment such as gloves, protective clothing, safety goggles, and, if necessary, respirators
Environmental Precautions: Avoid discharge into drains, soil, or water bodies; contain spill where possible
Methods for Clean-up: Sweep or scoop spilled material into suitable containers; use non-sparking tools; ventilate area; dispose of according to regulations
Decontamination Procedures: Wash spill area thoroughly with water and detergent

Handling and Storage

Handling: Avoid contact with skin, eyes, and clothing; work in a well-ventilated area or fume hood; wash hands thoroughly after handling
Storage: Store in tightly closed containers in a cool, dry, well-ventilated place; keep away from sources of ignition, acids, oxidizing agents, and moisture
Incompatible Materials: Acids, strong oxidizers, reducing agents, halogens
Special Precautions: Use explosion-proof equipment, prevent static discharge, ground all equipment

Exposure Controls and Personal Protection

Occupational Exposure Limits: ACGIH TLV: 0.1 mg/m³ (as tin); OSHA PEL: 0.1 mg/m³ (as tin)
Engineering Controls: Use local exhaust ventilation or process enclosures to reduce airborne concentrations below exposure limits
Personal Protective Equipment: Chemical-resistant gloves (such as nitrile), safety goggles, face shield, lab coat, and, in dusty environments, NIOSH-approved respirator
Hygiene Measures: Do not eat, drink, or smoke during use; wash exposed skin after work; change contaminated clothing immediately

Physical and Chemical Properties

Appearance: White to off-white crystalline powder
Odor: Odorless
Boiling Point: Decomposes before boiling
Melting Point: 150–155°C
Solubility: Insoluble in water, soluble in many organic solvents like chloroform
Vapor Pressure: Not measurable at ambient conditions
Density: 1.37 g/cm³ at 20°C
pH: Not applicable
Flash Point: Not readily combustible

Stability and Reactivity

Chemical Stability: Stable under normal conditions, sensitive to strong acids and oxidizers
Reactivity: May react with acids to yield toxic fumes; reacts with oxidizers and halogens
Hazardous Decomposition: Generates tin oxides, carbon oxides, and toxic organic vapors in fire or extreme heat
Conditions to Avoid: Moisture, acidic environments, excessive heat, and incompatible substances
Polymerization: Will not occur

Toxicological Information

Acute Toxicity: Oral LD50 (rat): 1600 mg/kg, Dermal LD50 (rabbit): data limited, Inhalation LC50 (rat): not well established
Routes of Exposure: Inhalation, skin absorption, eye and oral
Symptoms: Irritation of skin, eyes, respiratory tract, headache, nausea, abdominal pain
Chronic Effects: Repeated exposure has been linked with kidney and liver changes, neurotoxicity, effects on fertility, and developmental toxicity
Carcinogenicity: Not classified as a carcinogen by IARC, NTP, or OSHA
Sensitization: Possible skin sensitizer

Ecological Information

Toxicity: Highly toxic to aquatic life with long-lasting effects, acute and chronic aquatic toxicity noted in fish and invertebrates
Persistence and Degradability: Not readily biodegradable, has potential to persist in the environment
Bioaccumulative Potential: May bioaccumulate in aquatic food chains
Mobility in Soil: Low mobility due to poor water solubility, tends to bind to particles
Other Adverse Effects: May contribute to long-term adverse effects in aquatic environments

Disposal Considerations

Disposal Methods: Handle as hazardous waste, incinerate in a chemical incinerator with afterburner and scrubber, collect and submit to licensed waste disposal firms
Reuse/Recycling: Recycling of material and packaging where possible, subject to regulations
Contaminated Packaging: Dispose of in accordance with official requirements; do not reuse contaminated containers
Disposal Legislation: Comply with local, regional, and national hazardous waste laws

Transport Information

UN Number: 3077
Proper Shipping Name: Environmentally hazardous substance, solid, n.o.s. (Dibutyl tin oxide)
Transport Hazard Class: 9 (Miscellaneous dangerous substances)
Packing Group: III
Marine Pollutant: Yes
Special Transport Precautions: Protect from physical damage, secure containers to prevent movement, keep away from food and feedstuffs

Regulatory Information

US Regulations: Listed on TSCA inventory, subject to SARA Title III Section 313 reporting, CERCLA hazardous substance
EU Regulations: Covered by REACH, classified as a substance of very high concern for reproductive toxicity
Labeling Requirements: Follows GHS labeling with hazard pictograms, signal word, hazard and precautionary statements
Other Regulations: Subject to strict workplace controls and environmental release limits; local and state requirements may also apply