Cetyl Trimethyl Ammonium Chloride
Cetyl Trimethyl Ammonium Chloride (CTAC) is a cationic surfactant and quaternary ammonium compound characterized by a long hydrophobic cetyl (C16) alkyl chain and a positively charged ammonium head group. It appears as a white to pale yellow powder or flakes, soluble in water, and exhibits strong surface-active properties. CTAC is widely used in cosmetics, personal care, and industrial applications for its excellent conditioning, antistatic, emulsifying, and disinfectant capabilities. It functions primarily as a fabric softener, hair conditioner, and antimicrobial agent.
Cetyl Trimethyl Ammonium Chloride Uses
Primary UsesÂ
Cosmetics & Personal Care
- Acts as a conditioning agent in shampoos, conditioners, and hair treatments to reduce static and improve hair softness and manageability.
- Used as an emulsifier and stabilizer in creams, lotions, and other topical formulations.
- Provides antistatic properties in hair styling products and leave-on conditioners.
- Functions as an antimicrobial preservative and disinfectant in personal hygiene products.
Industrial Applications
- Employed as a fabric softener and antistatic agent in textile processing and laundry detergents.
- Used in emulsion polymerization as a surfactant and dispersing agent.
- Serves as a biocide and disinfectant in water treatment and cleaning products.
Secondary UsesÂ
Pharmaceuticals
- Occasionally used as an antiseptic or preservative in topical pharmaceutical formulations.
Agriculture
- Used in certain pesticide formulations as a surfactant to improve spreading and adhesion.
Oil & Gas
Utilized as an emulsifier and corrosion inhibitor in enhanced oil recovery processes and drilling fluids.
- Basic Identification Attributes
- Chemical Name (IUPAC): Hexadecyl(trimethyl)azanium chloride
- Common/Trade Name: Cetyl Trimethyl Ammonium Chloride, CTAC
- CAS Number: 112-02-7
- HS Code: 2923.29.00
- Molecular Formula: C19H42ClN
- Molecular Weight: 320.0 g/mol
- Synonyms:
- Hexadecyltrimethylammonium chloride
- CTAC
- Physical & Chemical Properties
- Physical State: White to pale yellow granular powder or flakes
- Color & Odor: White to pale yellow; mild ammonium-like odor
- Melting Point: ~237°C (decomposes)
- Boiling Point: Decomposes before boiling
- Density: ~0.9 g/cm³ (solid form)
- Solubility:
- Soluble in water (highly soluble)
- Insoluble in oils and non-polar solvents
- pH (1% aqueous): ~5–7
- Stability: Stable under normal storage conditions; sensitive to strong oxidizers
- Safety & Hazard Attributes
- Hazard Class (GHS): Skin irritant and eye irritant (Category 2)
- NFPA Ratings:
- Health: 2
- Flammability: 1
- Reactivity: 0
- Exposure Limits: Not specifically established; use appropriate PPE
- Toxicity: Moderate toxicity; avoid prolonged skin or eye contact
- Reactivity: Stable; incompatible with strong oxidizing agents
- Storage & Handling Attributes
- Storage Conditions: Store in a cool, dry, well-ventilated area away from incompatible substances
- Container Type: Sealed polyethylene or polypropylene containers
- Shelf Life: Typically 2–3 years under proper storage
- Special Handling: Avoid dust formation and contact with eyes and skin; use PPE during handling
- Regulatory & Compliance Attributes
- FDA Status: Approved for limited use in cosmetics (as per cosmetic regulations)
- REACH Status: Registered
- Transportation: Not classified as hazardous for transport
- Waste Disposal: Dispose in accordance with local environmental regulations
- Environmental & Health Impact
- Ecotoxicity: Toxic to aquatic organisms; avoid release into waterways
- Persistence: Moderately biodegradable
- Bioaccumulation: Low potential for bioaccumulation
- Carcinogenicity/Mutagenicity: Not classified as carcinogenic or mutagenic
Biodegradability: Partial biodegradability
-
Safety Handling Precautions
- PPE: Wear gloves, protective goggles, and dust mask when handling powders
- Handling: Avoid inhalation of dust and contact with skin and eyes
- Storage: Keep container tightly closed, store away from heat and incompatible materials
- Hygiene: Wash hands after handling; do not eat, drink, or smoke during use
First Aid Measures
- Inhalation: Move to fresh air immediately; seek medical attention if breathing difficulty occurs
- Skin Contact: Wash affected area thoroughly with soap and water; seek medical attention if irritation persists
- Eye Contact: Rinse cautiously with water for several minutes; remove contact lenses if present; seek medical help
- Ingestion: Rinse mouth; do not induce vomiting; seek medical advice immediately
Firefighting Measures
- Fire Hazards: Combustible; may produce toxic fumes including nitrogen oxides and hydrogen chloride
- Extinguishing Media: Use water spray, foam, dry chemical, or COâ‚‚
- Special Precautions: Firefighters should wear full protective gear and self-contained breathing apparatus
Decomposition Products: Hydrogen chloride, nitrogen oxides, carbon monoxide, carbon dioxide

Acidulants
Antioxidants
Nutraceutical Ingredients (food)
Collectors
Dust Suppressants
Explosives and Blasting Agents
Flocculants and Coagulants
Frothers
Leaching Agents
pH Modifiers
Precious Metal Extraction Agents
Antioxidants(plastic)
Colorants (Pigments, Dyes)
Fillers and Reinforcements
Flame Retardants
Monomers
Plasticizers
Polymerization Initiators
Stabilizers (UV, Heat)
Antifoaming Agents
Chelating Agents
Coagulants and Flocculants
Corrosion Inhibitors
Disinfectants and Biocides
Oxidizing Agents
pH Adjusters
Scale Inhibitors( water)
Antioxidants(cosmetic)
Emollients
Fragrances and Essential Oils
Humectants
Preservatives
Surfactants(cosmetic)
Thickeners
UV Filters
Fertilizers
Soil Conditioners
Plant Growth Regulators
Animal Feed Additives
Biostimulants
Pesticides (Herbicides, Insecticides, Fungicides)
Active Pharmaceutical Ingredients (APIs)
Excipients
Solvents(pharmaceutical)
Antibiotics
Antiseptics and Disinfectants
Vaccine Adjuvants
Nutraceutical Ingredients (pharmaceutical)
Analgesics & Antipyretics
Analytical Reagents
Chromatography Chemicals
Spectroscopy Reagents
Molecular Biology Reagents
Biochemical Reagents
Inorganic and Organic Standards
Laboratory Safety Chemicals
Specialty Laboratory Chemicals(Special Laboratory Equipment)
Demulsifiers
Hydraulic Fracturing Fluids
Scale Inhibitors(oil)
Surfactants(oil)
Drilling Fluids
Dyes and Pigments
Bleaching Agents
Softening Agents
Finishing Agents
Antistatic Agents
Admixtures
Waterproofing Agents
Sealants and Adhesives
Curing Compounds
Concrete Repair Chemicals
Anti-Corrosion Coatings
Surfactants(cleaning)
Builders
Enzymes
Solvents (Cleaning)
Fragrances
Electronic Chemicals
Catalysts
Lubricants
Photographic Chemicals
Refrigerants
Automotive chemicals
Pyrotechnic Chemicals
Biodegradable Surfactants
Bio-based Solvents
Renewable Polymers
Carbon Capture Chemicals
Wastewater Treatment Chemicals
Pigments
Solvents(paint)
Specialty Coatings
Binders/Resins
Additives
Driers
Anti-Corrosion Agents
Functional Coatings
Application-Specific Coatings
Fresh Herbs
Ground Spices
Whole Spices
Spice Blends
Dried Herbs
Leavening Agents
Dough Conditioners
Flour Treatments
Fat Replacers
Decoratives
Preservatives(baking)
Plasticizers & Softeners
Reinforcing Agents
Adhesion Promoters
Vulcanizing Agents
Antidegradants
Blowing Agents
Fillers & Extenders
Accelerators & Retarders