Product Name: Dihexadecyldimethylammonium Bromide
Synonyms: DDAB, Cationic surfactant
CAS Number: 2390-68-3
Recommended Use: Laboratory reagent, disinfectant, surfactant
Manufacturer: Please refer to local supplier information.
Contact Information: Emergency phone numbers should be posted in workplace.
GHS Classification: Acute toxicity (oral) Category 4, Skin corrosion/irritation Category 2, Eye damage/irritation Category 2A, Aquatic acute Category 1
Pictograms: Exclamation mark, corrosive, environment
Signal Word: Warning
Hazard Statements: Harmful if swallowed, causes skin irritation, causes serious eye irritation, toxic to aquatic life
Precautionary Statements: Wear protective gloves and eye protection; avoid release to environment; wash hands thoroughly after handling; if in eyes, rinse cautiously with water for several minutes; seek medical advice if feeling unwell.
Chemical Name: Dihexadecyldimethylammonium Bromide
Formula: C34H72BrN
Content: >98% (purity dependent on source)
Impurities: Unreacted amines, solvent traces possible
Molecular Weight: 586.83 g/mol
Inhalation: Move to fresh air, seek medical attention if symptoms persist – coughing, shortness of breath, throat irritation
Skin Contact: Rinse skin with plenty of water, remove contaminated clothing, wash before reuse, consult medical care for redness or rash
Eye Contact: Rinse carefully with water for at least 15 minutes, hold eyelids apart, remove contact lenses if present, seek immediate medical help
Ingestion: Rinse mouth, do not induce vomiting, drink water only if person is fully conscious, notify medical personnel, possible nausea or abdominal pain to monitor
Note to Physicians: Symptomatic treatment, monitor respiratory and gastrointestinal systems.
Suitable Extinguishing Media: Use dry chemical, carbon dioxide, foam, or water spray
Hazards from Combustion: May release toxic fumes, hydrogen bromide, nitrogen oxides, carbon monoxide
Protective Equipment: Wear self-contained breathing apparatus, chemical-resistant clothing
Fire-Fighting Instructions: Move containers from fire area if safe, cool exposed containers, avoid inhaling vapors, stay upwind of fire
Special Hazards: Product decomposes at high temperature, producing corrosive and harmful gases.
Personal Precautions: Avoid breathing dust, wear suitable protective clothing, avoid contact with skin and eyes, ensure adequate ventilation
Environmental Precautions: Prevent spillage from entering drains, soil, or watercourses—substance is harmful to aquatic life
Containment: Sweep up without raising dust, transfer to suitable containers for disposal, clean spill area thoroughly with water and detergent
Cleanup Methods: Use inert absorbent if needed, collect residues and dispose obeying local regulations.
Handling: Wear appropriate protective equipment, use only with adequate ventilation, avoid dust formation, do not eat, drink, or smoke while handling
Storage: Keep tightly sealed in original containers, store in a cool, dry, well-ventilated area, keep away from strong acids, oxidizers, and incompatible chemicals
Specific Precautions: Label containers clearly, avoid contamination of storage facilities, maintain integrity of packaging.
Occupational Exposure Limits: No established limits by OSHA, ACGIH
Engineering Controls: Use chemical fume hood or local exhaust, eyewash stations nearby
Personal Protective Equipment: Chemical-resistant gloves (nitrile, neoprene), safety goggles, lab coats, protective footwear
Respiratory Protection: Suitable mask or respirator for dust or aerosol
Hygiene Measures: Wash hands before breaks and at end of work day, remove contaminated clothing immediately.
Appearance: White to off-white waxy solid or powder
Odor: Mild, ammoniacal
Melting Point: 56-59°C
Boiling Point: Not applicable (decomposes)
Solubility: Slightly soluble in water, soluble in alcohol and chloroform
pH: Slightly alkaline aqueous solution
Vapor Pressure: Negligible at room temperature
Density: 0.98 - 1.02 g/cm³
Flash Point: Not determined (solid form)
Partition Coefficient (log Kow): Estimated high; likely to bioaccumulate.
Chemical Stability: Stable under recommended storage and use conditions
Reactivity: May react with strong oxidizing agents, acids
Hazardous Decomposition Products: Hydrogen bromide, carbon monoxide, nitrogen oxides, aliphatic hydrocarbons
Conditions to Avoid: Excess heat, open flame, incompatible substances
Polymerization: Does not occur under normal conditions.
Acute Toxicity: Harmful if swallowed, oral LD50 (rat) circa 1500 mg/kg
Skin and Eye Irritation: Causes irritation, redness, inflammation possible with extended contact
Respiratory Effects: Dust may cause irritation to nose, throat, lungs
Chronic Exposure: Repeated exposure may cause dermatitis, sensitivity
Carcinogenicity: No component listed as carcinogen by IARC, NTP, OSHA
Mutagenicity/ Reproductive Toxicity: Not established in available literature.
Aquatic Toxicity: Very toxic to aquatic organisms, LC50 (fish) values lower than 1 mg/L (acute), high risk for long-lasting effects
Persistence and Degradability: Not readily biodegradable, tends to persist in environment
Bioaccumulation: Potential exists due to high log Kow, could accumulate in aquatic species
Mobility in Soil: Low, binds to soil particles readily
Other Adverse Effects: Toxic to microorganisms, water treatment processes can become impaired if discharge is excessive.
Waste Disposal Methods: Dispose of contents and container as hazardous waste according to local/regional regulations, do not discharge to surface water or sewage system
Contaminated Packaging: Empty packaging must be handled as hazardous material, triple rinse and send to authorized waste management
Environmental Precautions: Prevent further spillage, minimize dust generation during disposal, consult environmental authority prior to disposal operations.
UN Number: 3077
UN Proper Shipping Name: Environmentally hazardous substance, solid, n.o.s. (Dihexadecyldimethylammonium Bromide)
Transport Hazard Class: 9
Packing Group: III
Environmental Hazards: Marine pollutant
Transport Labels: Class 9 Miscellaneous Dangerous Goods, Environmental Hazard
Special Precautions: Protect from moisture and physical damage during transit, ensure secure packaging.
US TSCA: Listed
EU REACH: Registration required for quantities above threshold
Canada DSL: Listed
Global Inventories: Compliance varies, check with local authorities
Classification: Hazardous under GHS and national workplace regulations
Other Regulations: Subject to workplace right-to-know laws, SARA Title III reporting may apply in large quantities, restrictions may exist for environmental discharges.
