Chemical Name: Tetrabutylammonium Hydrogen Sulfate
Synonyms: TBAHS, Tetrabutylammonium bisulfate
CAS Number: 32503-27-8
Molecular Formula: C16H37NO4S
Molecular Weight: 339.54 g/mol
Relevant Uses: Phase-transfer catalyst, chemical synthesis
Supplier Details: Refer to source or packaging label for manufacturer or distributor contact
Emergency Phone Number: Refer to product label or local poison center
Classification: Irritant to skin and eyes, acccording to GHS regulations
Signal Word: Warning
Hazard Statements: Causes skin irritation. Causes serious eye irritation. Harmful if swallowed.
Pictograms: Exclamation Mark (GHS07)
Precautionary Statements: Avoid breathing dust. Wear protective gloves, eye protection. Wash exposed skin thoroughly after handling.
Potential Health Effects: Inhalation may cause respiratory discomfort, skin contact may result in redness or rash, ingestion can create nausea or intestinal upset.
Environmental Hazards: May pose a risk to aquatic life due to sulfate content.
Exposure Routes: Skin, eyes, inhalation, ingestion
Substance: Tetrabutylammonium Hydrogen Sulfate
Concentration: Above 98% (typical purity for laboratory or industrial grade)
Chemical Formula: C16H37NO4S
Impurities: Trace byproducts from synthesis, often less than 1% of content
Other Additives: Not typically present
Inhalation: Move exposed person to fresh air; if breathing becomes difficult, seek immediate medical attention.
Eye Contact: Rinse eyes with lukewarm water for at least 15 minutes lifting eyelids frequently; seek prompt medical evaluation.
Skin Contact: Remove contaminated clothing; rinse affected area under running water with mild soap for at least 15 minutes.
Ingestion: Rinse mouth with water; do not induce vomiting; obtain medical help if large amounts swallowed or if symptoms persist.
Most Important Symptoms: Itching, burning sensation, redness of skin or eyes, headache, upset stomach.
Medical Attention: Required for persistent or severe symptoms, or if accidental exposure leads to acute distress.
Suitable Extinguishing Media: Dry chemical powder, carbon dioxide, foam, water spray (use any means appropriate for surrounding fire)
Specific Hazards: Material is not highly flammable, but heating creates toxic fumes containing nitrogen oxides, sulfur oxides, carbon oxides
Personal Protection: Firefighters should wear full protective gear and self-contained breathing apparatus
Combustion Byproducts: Hazardous vapor and particulate matter may be present in smoke
Special Measures: Cool containers near fire with water to prevent rupture from heat
Personal Precautions: Wear chemical-resistant gloves, safety goggles, and a suitable respirator if dust generation is likely
Environmental Precautions: Prevent spillage from reaching drains, surface water, or soil
Spill Response: Sweep up spilled material using a method that minimizes generation of airborne dust, gather in appropriate container for disposal
Cleaning Methods: Dampen powder to minimize airborne dust; ensure complete cleanup with water while avoiding runoff entering environment
Ventilation: Maintain good air flow throughout spill cleanup area
Handling Practices: Store in tightly-sealed containers; avoid generation of airborne dust; handle with dedicated chemical-resistant gloves
Hygiene Measures: Wash hands thoroughly before breaks, at end of shift, or after handling chemical
Storage Conditions: Keep container in dry, cool, well-ventilated place; temperature range 10-30°C
Incompatibles: Avoid strong oxidizers, strong acids or bases
Safe Transfer: Use dedicated scoops or tools to avoid contamination
Occupational Exposure Limits: No specific regulatory limit established; minimize contact at all times
Engineering Controls: Use enclosures or local exhaust for powder handling; maintain general area ventilation
Respiratory Protection: Use dust mask or respirator with particulate filter if airborne material exceeds safe concentration
Eye Protection: Safety goggles or face shield
Skin Protection: Chemical-resistant gloves, lab coat or apron
Additional Protection: Eyewash station and safety shower accessible in work area
Appearance: White to off-white crystalline powder
Odor: Faint ammonium or sulfurous odor
pH (5% solution): Approx. 3 to 5
Melting Point: 120 °C to 140 °C
Boiling Point: Not applicable (decomposes)
Solubility: Soluble in water and many organic solvents
Density: About 1.1 g/cm³
Flash Point: Not flammable under standard conditions
Vapor Pressure: Negligible at room temperature
Partition Coefficient: Not determined
Stability: Substance is stable if stored in dry, sealed containers protected from moisture and high humidity
Decomposition: Heating to decomposition can generate toxic gases including nitrogen oxides, sulfur oxides
Polymerization: Not expected to undergo hazardous polymerization
Incompatible Materials: Strong acids, strong bases, oxidizing agents
Hazardous Reactions: No violent reactions reported under normal handling; avoid mixing with incompatible substances
Acute Toxicity: Data not fully established, but ingestion or inhalation of significant quantity causes symptoms like headache, nausea, irritation
Skin Corrosion/Irritation: Causes mild to moderate irritation
Eye Damage/Irritation: Significant irritation possible; flushing required if exposed
Respiratory Sensitization: May trigger respiratory tract irritation on prolonged or repeated exposure
Carcinogenicity: Not listed by IARC, NTP, or OSHA as a known carcinogen
Mutagenicity/Teratogenicity: Insufficient data for conclusive evaluation
Chronic Effects: Prolonged or repeated exposure could cause dermatitis or persistent coughing
Ecotoxicity: Can be toxic to aquatic life; ammonium and sulfate ions may disrupt aquatic environments
Persistence and Degradability: Not readily biodegradable; substance may persist in water or soil for extended periods
Bioaccumulative Potential: No significant bioaccumulation expected due to relatively high solubility
Mobility in Soil: Material highly soluble; can migrate through soil and potentially reach groundwater
Environmental Precautions: Avoid large releases into environment, especially waterways or sewer systems
Waste Treatment Methods: Dispose of in accordance with federal, state, and local environmental control regulations
Product Disposal: Collect and deliver to licensed chemical waste disposal contractor
Container Disposal: Rinse empty containers several times with water before discarding; follow local rules for hazardous containers
Recommended Handling: Never pour unused material down sink or into storm drains
UN Number: None assigned for this product
Proper Shipping Name: Chemical, non-hazardous for transport
Transport Hazard Class: Not regulated
Packing Group: Not classified
Environmental Hazards: Avoid release into environment during transportation, use correctly sealed packaging
Transport Precautions: Protect containers against physical damage and prevent venting of dust
Inventory Status: Listed on TSCA (USA), EINECS (EU), DSL (Canada), and other major chemical inventories
Labeling Requirements: Compliant with OSHA (USA), CLP (EU), WHMIS (Canada); warning labels for skin and eye irritation
Workplace Regulations: Ensure compliance with OSHA, ACGIH and local health and safety legislation
Other Requirements: Users must follow local, regional, and national requirements for chemical handling and use
Restrictions: No specific bans but use only within established occupational exposure guidelines
