Product Name: Tetrabutyl-Ammonium Hydrogensulfate
Synonyms: N,N,N-Tributyl-1-butanaminium hydrogen sulfate
Chemical Formula: C16H37NO4S
CAS Number: 32503-27-8
Recommended Use: Phase transfer catalyst, laboratory reagent
Supplier: Various laboratory chemical suppliers
Emergency Contact Number: Refer to local poison control or CHEMTREC
GHS Classification: Skin irritation (Category 2), Eye irritation (Category 2A), Acute aquatic toxicity (Category 3)
Signal Word: Warning
Hazard Statements: Causes skin irritation. Causes serious eye irritation. Harmful to aquatic life.
Precautionary Statements: Avoid skin and eye contact. Wash hands thoroughly after handling. Avoid release into the environment.
Pictograms: Exclamation mark, Aquatic toxicity symbol
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Target Organs: Eyes, skin
Chemical Name: Tetrabutyl-Ammonium Hydrogensulfate
CAS Number: 32503-27-8
EC Number: 251-094-3
Concentration: 98-100%
Impurities: Trace residuals of butylamine derivatives
Inhalation: Move to fresh air. Seek medical attention if breathing becomes difficult or irritation persists.
Skin Contact: Wash with plenty of soap and water. Remove contaminated clothing. If irritation develops, get medical help.
Eye Contact: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. Get immediate medical attention.
Ingestion: Rinse mouth with water, do not induce vomiting. Get medical attention immediately.
Most Important Symptoms: Irritation, redness or pain in eyes and skin, gastrointestinal discomfort if swallowed.
Suitable Extinguishing Media: Water spray, foam, dry chemical, carbon dioxide
Unsuitable Media: Direct water jet
Hazards Arising From Chemical: Emits toxic fumes of nitrogen oxides, sulfur oxides, carbon oxides under combustion
Protective Equipment for Firefighters: Wear self-contained breathing apparatus, full protective gear
Special Precautions: Cool containers with water if exposed to fire. Evacuate personnel to safe areas.
Personal Precautions: Wear gloves, goggles, lab coat. Provide adequate ventilation. Avoid dust formation.
Environmental Precautions: Prevent further leakage or spillage if safe. Do not let product enter drains. Avoid release into environment.
Methods for Cleanup: Sweep up and shovel material. Keep in a suitable, closed container for disposal. Wash spill area with plenty of water.
Decontamination Procedures: Use mild soap and water. Dispose of contaminated materials as hazardous waste.
Precautions for Safe Handling: Wear personal protective equipment. Avoid contact with skin, eyes and clothing. Use only in well-ventilated areas.
Hygiene Measures: Do not eat, drink or smoke while using. Wash hands after use.
Conditions for Safe Storage: Store in a cool, dry, well-ventilated place. Keep container tightly closed. Avoid sources of ignition and extreme heat.
Incompatible Materials: Strong oxidizers, strong acids and bases, water-reactive materials
Control Parameters: No established occupational exposure limits (OSHA, ACGIH, NIOSH)
Engineering Controls: Use chemical fume hood or local exhaust ventilation.
Personal Protective Equipment (PPE):
Gloves (nitrile or neoprene), chemical safety goggles, lab coat, appropriate face protection if splashing possible.
Respiratory Protection: If dust or aerosol risk, use NIOSH-approved respirator.
Environmental Exposure Controls: Avoid discharge to the environment. Use containment measures to avoid spread of spills.
Appearance: White, crystalline powder
Odor: Characteristic, slight amine odor
Odor Threshold: No data available
pH: Slightly acidic in solution (4-6 at 20°C)
Melting Point: 197-200°C
Boiling Point: Decomposes before boiling
Flash Point: No data available
Evaporation Rate: Not applicable
Flammability: Not classified as flammable
Vapor Pressure: Negligible at room temperature
Vapor Density: Not applicable
Relative Density: 1.04-1.08 g/cm³
Solubility: Soluble in water, alcohols
Partition Coefficient (n-octanol/water): No data available
Auto-ignition Temperature: No data available
Decomposition Temperature: Decomposes > 200°C
Viscosity: Not applicable
Chemical Stability: Stable under normal storage and handling conditions
Possibility of Hazardous Reactions: No hazardous polymerization under recommended conditions
Conditions to Avoid: Heat, moisture, incompatible materials
Incompatible Materials: Strong oxidizers, strong acids and bases
Hazardous Decomposition Products: Nitrogen oxides, sulfur oxides, carbon oxides
Acute Toxicity: LD50 oral, rat > 2000 mg/kg (low acute toxicity)
Routes of Exposure: Inhalation, ingestion, skin, eyes
Symptoms: Irritation to skin, eyes, mucous membranes; possible gastrointestinal discomfort on ingestion
Corrosivity/Irritation: Skin and eye irritant
Chronic Effects: No data suggesting carcinogenicity, mutagenicity, or reproductive toxicity
Sensitization: No reported effects
Target Organs: Skin, eyes
Further Information: Toxicological profiles suggest manage with standard precautions for irritants
Toxicity to Aquatic Life: Harmful to aquatic organisms, may cause long-term adverse effects
Persistence and Degradability: No specific data, suspected to have low bioaccumulation
Bioaccumulative Potential: Likely to be low based on structure
Mobility in Soil: High solubility in water, can migrate in soil
Other Adverse Effects: Avoid release into waterways and soil to reduce environmental impact
Disposal Methods: Collect and contain in sealed container, dispose of at licensed chemical waste facility
Contaminated Packaging: Rinse barrel and send for disposal or recycling as hazardous waste
Sewage Disposal: Do not pour down drains or sewers
Regulations: Follow local, state, and federal hazardous waste regulations
UN Number: Not assigned
UN Proper Shipping Name: Not regulated for transport
Transport Hazard Class: Not classified
Packing Group: Not specified
Environmental Hazards: Not considered marine pollutant, but should avoid spillage
Special Precautions for User: Transport in upright, secure containers
TSCA Status: Listed
REACH Status: Registered
SARA 313: Not listed
California Prop 65: Not listed
WHMIS Classification: D2B (toxic material causing other toxic effects)
Other Regulations: Ensure compliance with workplace safety, chemical hygiene, waste disposal, and labeling rules. Detailed site-specific controls may be required depending on use and jurisdiction.
