Product Name: Didodecyldimethylammonium Bromide
Synonyms: Dodecyl dimethyl ammonium bromide, Didodecyl dimethyl ammonium bromide
Chemical Formula: C26H56BrN
CAS Number: 3282-73-3
Recommended Use: Used as a disinfectant, biocide, industrial cleaning agent, and surfactant. Common in formulation labs, water treatment plants, textiles, and some agricultural settings.
Manufacturer Contact: Emergency contact details and customer support are provided by the supplier/manufacturer.
Classification: Acute toxicity (Oral, Dermal), Skin irritation, Eye irritation, Hazardous to aquatic environment
GHS Label Elements: Pictograms with exclamation mark (irritation), corrosion (corrosive effects), and environment (aquatic hazard)
Signal Word: Danger
Hazard Statements: Causes severe skin burns and eye damage. Harmful if swallowed, toxic to aquatic life with long-lasting effects. Risk for respiratory or gastrointestinal irritation increases with concentration.
Precautionary Statements: Avoid inhalation and skin contact, wear protective gear, do not let material enter waterways.
Chemical Name: Didodecyldimethylammonium Bromide
Content: >98% purity
CAS Number: 3282-73-3
Impurities: Trace amounts of related ammonium salts may be found in technical grades; these do not significantly change hazard profile.
Other Components: Does not contain stabilizers, diluents or added solvents.
Eye Contact: Rinse cautiously with water for at least 15 minutes. Remove contact lenses. Immediate medical attention is necessary; risk of permanent eye damage.
Skin Contact: Take off contaminated clothing, wash skin with mild soap and plenty of water. Consult a physician for burns or irritation.
Inhalation: Move to fresh air, keep at rest, provide oxygen if breathing is difficult. Medical attention required if symptoms persist.
Ingestion: Do not induce vomiting. Rinse mouth thoroughly with water. Call poison center or doctor immediately. Avoid giving anything by mouth to an unconscious person.
Most Important Symptoms: Severe irritation, burns to mucous membranes, risk of serious eye injury, trouble breathing from inhalation.
Suitable Extinguishing Media: Water spray, dry chemical, carbon dioxide, or alcohol-resistant foam.
Unsuitable Extinguishing Media: Strong jet of water can cause chemical spread.
Specific Hazards: Toxic fumes (hydrogen bromide, nitrogen oxides, carbon oxides) may form during combustion.
Protective Equipment: Use self-contained breathing apparatus, chemical protective clothing.
Other Recommendations: Cool containers exposed to flames with water mist to prevent bursting.
Personal Precautions: Use chemical-resistant gloves, goggles, and suitable protective clothing. Ensure adequate ventilation.
Environmental Precautions: Prevent entry into sewers, surface water, or ground water. Contain spill with sand or earth.
Spill Clean-Up: Absorb on inert material, collect in properly labeled containers, dispose according to regulations. Avoid breathing dust or vapors. Decontaminate area thoroughly after removal.
Reporting: Notify authorities if product enters water bodies or public sewers due to toxicity to aquatic life.
Handling: Only trained personnel should handle Didodecyldimethylammonium Bromide. Use in well-ventilated areas, avoid inhaling dust or vapor. Prevent skin, eye, and clothing contact. Do not eat, drink, or smoke during use.
Storage: Store in a tightly closed, non-metallic, corrosion-resistant container in a cool, dry, well-ventilated place, away from incompatible materials (strong oxidizers, acids). Keep away from heat sources and sunlight.
Other Considerations: Maintain containment integrity, monitor for possible leaks, keep storage areas labeled and locked to restrict access.
Engineering Controls: Work with local exhaust ventilation, process enclosures, or other engineering controls to keep airborne concentrations below recommended exposure limits.
Personal Protective Equipment: Wear chemical-resistant gloves, safety goggles or face shields, laboratory coats or aprons, and, if there is a risk of inhalation, use approved respirators.
Hygiene Practices: Wash hands, forearms, and face thoroughly after handling and before eating or smoking. Remove and wash contaminated clothing before reuse.
Occupational Exposure Limits: No specific regulatory limits established, but minimize exposure as much as possible.
Appearance: White or slightly yellowish powder or crystalline solid
Odor: Faint, characteristic amine-like odor
Odor Threshold: Data not available
pH Value (1% aqueous solution): 6.0 – 8.5
Melting Point/Freezing Point: 175–180°C
Boiling Point: Decomposes before boiling
Flash Point: Not determined (solid does not readily ignite)
Evaporation Rate: Not applicable
Flammability: Non-flammable
Vapor Pressure: Negligible
Vapor Density: Not applicable
Solubility: Soluble in water, alcohols, insoluble in nonpolar solvents
Partition Coefficient (Octanol/Water): Not available
Auto-ignition Temperature: No data
Decomposition Temperature: Above 180°C, releases toxic fumes
Viscosity: Not applicable
Chemical Stability: Stable under normal temperatures and pressures when stored in original containers
Reactivity: Reacts with strong oxidizers and acids
Hazardous Decomposition Products: Releases hydrogen bromide, nitrogen oxides, possible ammonia and carbon oxides during combustion or thermal decomposition
Conditions to Avoid: Excessive moisture, extreme heat, acid contact, incompatible materials
Polymerization: Does not undergo hazardous polymerization
Routes of Exposure: Inhaling dust or vapors, swallowing, skin and eye contact
Acute Toxicity: LD50 Oral (rat): 370 mg/kg (toxic if swallowed)
Skin Corrosion/Irritation: Causes serious skin damage on contact
Serious Eye Damage/Irritation: Causes blindness, blurred vision, and severe eye burns
Respiratory Sensitization: Irritating to the respiratory tract, may trigger coughing, shortness of breath
Chronic Effects: Prolonged exposure has potential for organ toxicity. Damage to mucosal linings with repeated contact.
Carcinogenicity: No evidence of carcinogenic effect found in available studies.
Mutagenicity/Genotoxicity: No evidence for mutagenic or genotoxic effects in tested concentrations.
Reproductive Toxicity: No adverse reproductive effects reported in available data.
Toxicity to Aquatic Life: Very toxic to aquatic organisms (fish, algae, daphnia) even at low concentrations
Persistence and Degradability: Biodegradation can be slow; accumulates in sediment and water unless treated
Bioaccumulation Potential: Not considered highly bioaccumulative, but harmful effects persist in water bodies
Mobility in Soil: Moderately mobile, binds to organic matter
Other Adverse Effects: Disrupts microbial and aquatic ecosystems. Avoid uncontrolled environmental release.
Waste Disposal Method: Dispose of in accordance with local/regional/national regulations. Incinerate in a chemical incinerator equipped with afterburner and scrubber.
Container Disposal: Triple rinse and puncture empty containers. Dispose as hazardous waste. Do not reuse packaging.
Contaminated Materials: Treat contaminated materials as hazardous. Prevent leaching or runoff into soil and water.
Special Precautions: Follow appropriate environmental agency guidelines and record waste disposal procedures to prevent future liability.
UN Number: 1759
UN Proper Shipping Name: Corrosive solid, n.o.s. (Didodecyldimethylammonium Bromide)
Transport Hazard Class: 8 (Corrosive substances)
Packing Group: II
Environmental Hazards: Marine pollutant
Special Precautions for User: Label all packaging, keep upright and securely closed. Emergency response guide and PPE must stay accessible during all stages of transport.
Labeling: Subject to hazard labeling under GHS and other local chemical safety frameworks.
Inventory Status: Listed on major chemical inventory lists (TSCA, EINECS, DSL, AICS, et cetera).
Regulatory Restrictions: Use limited to industrial, research, and controlled commercial settings. Environmental discharge heavily restricted.
SARA Title III: Does not appear among specifically regulated substances but falls under general chemical safety and reporting requirements.
Other Local/National Regulation: Check local and regional occupational health and environmental standards before use or disposal.
