Dodecyltrimethylammonium chloride, often listed in Asian supplier catalogs under the trade shorthand DTAC or surfactant code 1231, is one of the most widely used single-chain cationic surfactants in the quaternary ammonium family. Formulators reach for it when they need strong substantivity to negatively charged surfaces, reliable antistatic performance, or a cationic charge carrier that stays effective across a broad pH range. This article walks through what DTAC 1231 is chemically, where it is commonly used in household and industrial formulations, and what procurement teams should check before committing to a supplier.
What Is DTAC 1231?
Dodecyltrimethylammonium chloride (CAS 112-00-5) is a quaternary ammonium salt in which a twelve-carbon (lauryl) alkyl chain is bonded to a trimethylammonium head group, with chloride as the counterion. The “1231” designation follows a common industry naming convention for alkyl trimethyl quats: “12” for the C12 chain, “3” for the three methyl groups, and “1” for the single long chain.
Because the positive charge on the nitrogen is permanent, DTAC remains cationic regardless of pH. This distinguishes it from amine-based surfactants, which lose their charge as pH rises. The C12 chain gives DTAC higher water solubility and a higher critical micelle concentration than longer-chain analogs such as cetyltrimethylammonium bromide, which makes it easier to handle in concentrated aqueous formulations. It is typically supplied as a 30-50 percent aqueous solution or as a higher-active paste, and it sits within the broader family of quaternary ammonium salts that share this permanently charged structure.
Household and Institutional Applications
In household and institutional (I&I) chemistry, DTAC is valued mainly for three properties: its affinity for negatively charged surfaces, its antistatic action, and its cationic antimicrobial character.
Typical application areas where dodecyltrimethylammonium chloride may be evaluated include:
- Fabric care: as a component in softener and antistatic systems, where the cationic head adsorbs onto anionic fiber surfaces and reduces static charge buildup, particularly on synthetic fabrics.
- Hair conditioning bases: shorter-chain trimethyl quats can be considered as conditioning and wet-combing aids in rinse-off systems, often in combination with fatty alcohols.
- Hard-surface and sanitizing formulations: like other cationic quats, DTAC is commonly explored as part of antimicrobial blends. Regulatory clearance for biocidal claims varies by market and must be verified locally.
Formulators should remember the general rule of cationic chemistry: DTAC is not compatible with anionic surfactants such as LAS or SLES in the same phase, since the oppositely charged species form insoluble complexes. Nonionic and amphoteric co-surfactants are the usual partners.
Industrial Applications: From Water Treatment to Materials Science
Outside the consumer sector, DTAC appears in a diverse range of industrial roles:
- Water treatment and oilfield chemistry: cationic surfactants can be considered as components of clay-stabilizing and biocidal packages, and DTAC’s relatively high water solubility makes dosing straightforward in continuous systems.
- Mineral processing: alkyl trimethyl quats are commonly explored as cationic collectors in reverse flotation, for example in separating silicates from iron ore or in potash processing.
- Materials synthesis: in laboratory and pilot work, DTAC serves as a micelle-forming template and particle-stabilizing agent. Its shorter chain produces smaller micelles than C16 analogs, which gives researchers a way to tune pore size or particle morphology.
- Organic synthesis: DTAC may be evaluated as a phase transfer component in two-phase reactions, although dedicated catalysts such as tetrabutylammonium salts are more common choices for demanding conversions.
Within our own range, dodecyltrimethylammonium chloride (DTAC) is stocked alongside its C16 counterpart hexadecyltrimethylammonium bromide (CTAB), so buyers who need to screen chain-length effects in an application can source both from a single supplier and compare like for like.
Specifications and Quality Parameters Buyers Should Check
When qualifying a DTAC supplier, the certificate of analysis deserves close attention. Key parameters include:
- Active content: confirm whether the quoted percentage refers to total quaternary content or to the specific C12 homolog, and which analytical method is used.
- Homolog distribution: commercial lauryl chains derived from natural feedstocks contain a distribution of chain lengths. A high C12 fraction gives more predictable performance in surface-sensitive applications.
- Free amine and amine hydrochloride: residues from incomplete quaternization can affect odor, color, and performance, and are a useful marker of process control.
- Color and clarity: aqueous DTAC solutions should be clear to pale yellow; darkening can indicate thermal stress or impurities.
- pH of solution and water content: both matter for formulation stability and for accurate dosing calculations.
Consistent values across consecutive lots matter more than any single impressive number. A supplier who shares full COA data lot after lot, and flags any process change in advance, reduces reformulation risk on your side.
Packaging, Handling, and Logistics
DTAC solutions are typically shipped in 200 kg plastic drums or 1000 kg IBC totes; solid or paste grades in 25 kg drums or bags. The material is corrosive to eyes and irritating to skin in concentrated form, so standard cationic-surfactant handling precautions apply: gloves, eye protection, and adequate ventilation. Aqueous solutions should be stored away from strong oxidizers and protected from freezing, since freeze-thaw cycles can cause phase separation that requires re-homogenization before use.
For buyers in the Middle East and other export markets, confirm the correct transport classification with your supplier for the specific grade and concentration, since hazard classification can differ between dilute solutions and high-active grades.
Why AXIA CHEM
AXIA CHEM supplies quaternary ammonium salts, including DTAC, from audited production partners in China, with pre-shipment COA review, retained samples for every lot, and documentation support for export markets in the GCC and beyond. Our team responds to technical and commercial inquiries quickly, supports sample evaluation before commercial orders, and keeps communication clear from quotation through delivery. If you are evaluating dodecyltrimethylammonium chloride for a household, I&I, or industrial application, contact us for current availability, specifications, and pricing.
Regulatory disclaimer: These products are supplied for research, formulation development, industrial and non-regulated applications. Final suitability for pharmaceutical, oral care, cosmetic, food-contact or biocidal applications shall be verified by the buyer according to local regulations. AXIA CHEM does not claim that any product is FDA approved, USP/EP certified, GMP grade or approved for any specific regulated end use unless otherwise confirmed in writing with supporting documentation.
