Product Name: Didecyldimethylammonium Bromide
Chemical Formula: C22H48BrN
Synonyms: DDMAB, N,N-Didecyl-N,N-dimethylammonium bromide
CAS Number: 2390-68-3
Recommended Use: Biocide, disinfectant, industrial cleaning applications, surface treatment
Supplier Information: Manufacturer contact details available on label or container
Emergency Telephone Number: Local regulatory or poison control center
Classification (GHS): Acute Toxicity (Oral) Category 4, Skin Corrosion/Irritation Category 1B, Serious Eye Damage Category 1, Hazardous to Aquatic Environment (Acute) Category 1, Hazardous to Aquatic Environment (Chronic) Category 1
Signal Word: Danger
Hazard Statements: Harmful if swallowed. Causes severe skin burns and eye damage. Very toxic to aquatic life, with long lasting effects.
Precautionary Statements: Wear protective gloves, protective clothing, and eye/face protection. Avoid release to the environment. Wash skin thoroughly after handling. Do not eat, drink, or smoke while using.
Pictograms: Corrosive, Exclamation Mark, Environment
Chemical Name: Didecyldimethylammonium Bromide
Common Name: DDMAB
CAS Number: 2390-68-3
Concentration: >98% (varies by supplier specification)
Impurities and Stabilizing Additives: None relevant for classification
Inhalation: Move to fresh air. Seek immediate medical attention if symptoms develop. If breathing stops, start artificial respiration.
Skin Contact: Remove contaminated clothing. Rinse skin with plenty of water for at least 15 minutes. Seek medical advice for persistent irritation or burns.
Eye Contact: Rinse cautiously with water for at least 15 minutes, lifting eyelids occasionally. Remove contact lenses if easy to do. Immediate hospital assessment advised.
Ingestion: Rinse mouth. Do not induce vomiting. Immediately call poison control center or doctor.
Symptoms and Effects: May cause burning sensation, severe irritation, blistering to skin and eyes, and respiratory symptoms.
Suitable Extinguishing Media: Use dry chemical, foam, carbon dioxide, or water spray for surrounding fire.
Unsuitable Media: Avoid direct water jet on product.
Specific Hazards: Combustion may yield toxic fumes including hydrogen bromide, nitrogen oxides.
Protective Equipment and Precautions: Firefighters should wear self-contained breathing apparatus, full protective gear. Avoid inhaling gases and run-off.
Other Information: Containers exposed to fire may explode from pressure build-up. Cool containers with water spray from safe distance.
Personal Precautions: Use personal protective equipment—gloves, eye protection, chemical-resistant suit. Ventilate area.
Environmental Precautions: Prevent entry into sewers, watercourses, soil. Report large spills to authorities.
Methods for Containment: Contain spill using inert absorbent materials (vermiculite, sand, or earth).
Methods for Cleanup: Scoop up and place in labeled, closed containers for disposal. Clean area thoroughly with water. Dispose of collected material in accordance with local regulations.
Handling: Handle in a well-ventilated area. Avoid contact with skin, eyes, and clothing. Use proper hand protection and protective clothing. Do not breathe dust or vapor.
Hygiene Practices: Wash hands and face before breaks and immediately after use. Remove contaminated clothing.
Storage Conditions: Store in cool, dry, well-ventilated place in original tightly closed containers. Keep away from heat, ignition sources, and incompatible materials such as strong oxidizers or acids.
Incompatible Materials: Strong oxidizers, acids, anionic surfactants
Exposure Limits: No established occupational exposure limit available
Engineering Controls: Use local exhaust ventilation or process enclosure to minimize exposure.
Respiratory Protection: Use approved respirator if exposure limits are exceeded or irritation develops.
Skin Protection: Wear chemical resistant gloves (nitrile, neoprene), long-sleeved shirts, pants, and boots.
Eye and Face Protection: Use safety goggles with side shields and a face shield.
General Protective Measures: Maintain good industrial hygiene. Do not eat, drink, or smoke around the product.
Appearance: White to off-white crystalline solid or powder
Odor: Mild, characteristic
Odor Threshold: Not available
pH: 6–8 (1% solution in water)
Melting Point: Around 180°C
Boiling Point: Decomposes before boiling
Flash Point: Not applicable
Evaporation Rate: Not applicable
Flammability: Not classified as flammable
Vapor Pressure: Not applicable
Vapor Density: Not applicable
Relative Density: 0.95–1.05 g/cm³
Solubility: Soluble in water and alcohols
Partition Coefficient (log Kow): 3.3 (estimated)
Auto-ignition Temperature: Not available
Decomposition Temperature: Above 200°C
Viscosity: Not available
Stability: Stable under standard handling and storage conditions.
Reactivity: No hazardous reactions expected under normal conditions.
Conditions to Avoid: Heat, sparks, open flames, moisture, direct sunlight
Incompatible Materials: Strong oxidizers, acids, anionic detergents
Decomposition Products: Hydrogen bromide, nitrogen oxides, dimethylamine gases if burned
Polymerization: Product does not undergo hazardous polymerization.
Acute Toxicity (Oral): LD50 (rat): 430 mg/kg
Acute Toxicity (Dermal): LD50 (rabbit): >2000 mg/kg
Acute Toxicity (Inhalation): Data not sufficiently available
Skin Corrosion/Irritation: Causes severe burns
Eye Damage/Irritation: Causes serious eye damage
Respiratory Sensitization: Not classified
Skin Sensitization: Not classified
Chronic Toxicity: Repeated exposure may cause dermatitis, reversible corneal injury
Mutagenicity, Carcinogenicity, Reproductive Toxicity: No significant data available
Target Organ Effects: Eyes, skin, respiratory system
Acute Aquatic Toxicity: LC50 (fish, 96h): <0.3 mg/L
Chronic Aquatic Toxicity: Highly toxic with long-term effects
Persistence and Degradability: Moderately persistent, slow degradation in soil and water
Bioaccumulative Potential: May bioaccumulate in aquatic organisms
Mobility in Soil: Likely to adsorb to soil, low mobility
Other Adverse Effects: Avoid release into environment. Harms aquatic life.
Waste Disposal Methods: Dispose of contents in accordance with local, regional, and national regulations. Do not allow product or washings to reach sewers, surface water, or soil.
Empty Containers: Triple rinse and dispose of according to regulations. Do not reuse packaging.
Waste Codes: Check regional government or EPA listings for applicable hazardous waste codes.
Special Precautions: Use licensed chemical waste contractor for large volumes. Label all waste containers clearly.
UN Number: UN 2922
UN Proper Shipping Name: Corrosive liquid, toxic, n.o.s. (Didecyldimethylammonium Bromide)
Transport Hazard Class: 8 (Corrosive), 6.1 (Toxic, if applicable)
Packing Group: II or III (depending on concentration and regulatory requirements)
Marine Pollutant: Yes
Special Precautions for User: Use approved packaging, mark with proper labels, transport by trained personnel
Transport in Bulk: According to Annex II of MARPOL 73/78 and IBC Code
OSHA Status: Corrosive material across most jurisdictions
TSCA Status: Listed on the US TSCA inventory
SARA Title III: Not listed as an extremely hazardous substance
REACH Status: Registered under EC regulations
WHMIS Classification: Class E (Corrosive Material), Class D2B (Toxic Material Causing Other Toxic Effects)
Other International Regulations: Subject to local chemical safety legislation worldwide. Compliance with EU, US, Canadian, Australian, Asian, and other standards required.
Labeling: Corrosive, environmentally hazardous substance according to GHS and most global directives.
