Chemical Name: Tetramethylammonium sulfate
Synonyms: TetraMethylAmmonium Sulphate, TMA Sulfate
Chemical Formula: (CH3)4N2SO4
CAS Number: 57267-78-4
Recommended Use: Laboratory reagent, chemical synthesis, industrial processing
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GHS Classification: Acute toxicity (oral): Category 3, Serious eye damage/irritation: Category 2A, Skin irritation: Category 2
Pictograms: Skull and crossbones, exclamation mark
Signal Word: Danger
Hazard Statements: Toxic if swallowed, causes skin irritation, causes serious eye irritation
Precautionary Statements: Avoid contact with skin and eyes, do not breathe dust, wear protective gloves and eye protection
Potential Health Effects: Harmful if ingested or inhaled, irritates respiratory tract, eyes, and skin, can provoke headaches, nausea, and vomiting
Chemical Identity: Tetramethylammonium sulfate
Common Name: TMA Sulfate
Concentration: ≥98% (pure unless otherwise stated)
Other Components: Trace inorganic impurities <1%
Molecular Weight: 238.32 g/mol
Inhalation: Move person to fresh air right away, maintain breathing, seek medical help if symptoms persist
Skin Contact: Remove contaminated clothing, wash affected area thoroughly with soap and water, get medical attention if irritation stays
Eye Contact: Rinse eyes gently with plenty of water for several minutes, remove contact lenses if present and easy, keep eyes open, call a physician
Ingestion: Never give anything by mouth to an unconscious person, rinse mouth, do not induce vomiting, get immediate medical care
Most Important Effects: May damage organs through prolonged or repeated exposure, can cause severe respiratory distress if inhaled in large amounts
Suitable Extinguishing Media: Water spray, CO2, dry chemical, alcohol-resistant foam
Special Hazards: Emits toxic fumes of ammonia, nitrogen oxides, and sulfur oxides under fire conditions
Protection for Firefighters: Wear self-contained breathing apparatus, full protective gear
Explosion Data: Non-flammable, does not react with common extinguishing agents, but thermal decomposition produces corrosive and toxic gases
Personal Precautions: Use personal protective gear including respirator, gloves, and goggles; avoid dust formation; avoid breathing vapors or mist
Environmental Precautions: Prevent further leakage or spillage if safe; keep out of drains, surface water, groundwater, and soil
Methods for Clean-up: Sweep up and shovel, gather spillage in suitable containers for disposal; ventilate the area; wash spilled area after pickup; avoid raising dust
Handling: Avoid contact with skin or eyes, do not breathe dust, always work in a well-ventilated area, use mechanical exhaust where feasible, keep containers tightly closed
Storage: Store in a cool, dry place, keep container closed when not in use, keep away from strong acids, oxidizing agents, and bases, store in secondary containment to control leaks
Other Precautions: Label containers clearly, separate from incompatible substances, follow appropriate workplace chemical hygiene measures
Engineering Controls: Use chemical fume hood to minimize inhalation exposure, employ local exhaust ventilation at points of dust generation
Personal Protective Equipment: Wear gloves (nitrile or neoprene), safety goggles or face shield, laboratory coat or chemical-resistant clothing, approved respirator for dust or mist
Hygiene Measures: Wash hands before breaks and after handling, remove contaminated clothing and wash before reuse, no eating or smoking in work area
Workplace Exposure Limits: No specific OSHA or ACGIH thresholds; keep airborne levels low by following best practices
Appearance: White crystalline powder
Odor: Very slight, amine-like
Melting Point: Decomposes above 100°C
Boiling Point: Not available (decomposes)
Solubility: Soluble in water
pH of Solution: ~7-9 in aqueous solution
Vapor Pressure: Not significant at room temperature
Density: 1.27 g/cm3 at 20°C
Partition Coefficient: Not determined
Chemical Stability: Stable under recommended storage and use conditions
Reactivity: Reacts with strong oxidizing agents and acids; releases toxic gases on decomposition
Possible Hazardous Reactions: Produces ammonia, nitrogen oxides, and sulfur oxides when heated strongly
Conditions to Avoid: Moisture, excessive heat, contact with incompatible chemicals
Incompatible Materials: Strong oxidizers, strong acids, strong bases, halogens
Hazardous Decomposition: Ammonia, sulfur oxides, nitrogen oxides, methylamines
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Acute Toxicity: Oral LD50 (rat): Approximately 50-200 mg/kg
Symptoms: Headache, dizziness, nausea, vomiting, abdominal pain, skin redness, eye watering and pain
Chronic Effects: Repeated exposure damages liver, kidneys, and nervous system; long-term skin or eye contact increases risk of sensitization
Carcinogenicity: Not classified as carcinogen by NTP, IARC, OSHA
Other Data: Can aggravate pre-existing respiratory, skin, and eye conditions
Aquatic Toxicity: Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment
Persistence: Degrades slowly in soil and water
Bioaccumulation Potential: Not expected to bioaccumulate significantly, but mobility in water can increase local concentrations
Other Harmful Effects: Alters pH of water bodies, disrupts aquatic flora and fauna, avoid large releases to environment
Waste Disposal Methods: Dispose of contents and containers in accordance with local, state, federal regulations; hazardous waste must not be poured down the drain
Packaging Disposal: Rinse and destroy empty containers before recycling or landfill; use triple rinsing and puncture to prevent reuse
Special Precautions: Consult professional licensed waste disposal service, avoid release to the environment, do not mix with other waste streams
UN Number: Not regulated for land, air, or sea transport as hazardous
Proper Shipping Name: Tetramethylammonium sulfate or appropriate chemical name
Transport Hazard Class: Not classified
Packing Group: No assignment
Environmental Hazards: Not considered environmentally hazardous by transport regulations, although accidental release should be prevented
Special Precautions for Transport: Carefully secure containers to prevent leaks and breaks, keep away from incompatible materials during transport
TSCA (USA): Listed
EINECS (Europe): Listed
REACH/CLP: Subject to annual volume and registration requirements if manufactured or imported in the EU
SARA Title III: Not subject to specific reporting under Sections 302, 304, 311, or 313
OSHA Status: Hazardous chemical requiring inclusion in chemical safety training
Other National Inventory: Listed in Australia AICS, Canada DSL, Japan ENCS
Workplace Labeling: Label all units with chemical name, hazard pictograms, and primary risk phrases
Other Regulatory Information: Follow all applicable local, regional, and national regulations for handling, storage, and disposal; keep safety training and documentation current for all employees handling this substance
