Cetyl Trimethyl Ammonium Chloride (CTAC), identified by CAS 112-02-7, is a fascinating chemical compound whose structure dictates its broad utility as both a surfactant and an antiseptic. For scientists and formulators, understanding the inherent properties of CTAC is key to leveraging its full potential. As a dedicated manufacturer, we provide high-quality CTAC and insights into its scientific basis.

At its core, CTAC is a quaternary ammonium salt. Its molecular formula, C19H42ClN, reveals a structure featuring a long, hydrophobic 16-carbon alkyl chain (cetyl group) attached to a positively charged nitrogen atom, which is further bonded to three methyl groups. The counter-ion is chloride. This amphipathic nature – having both hydrophobic (the fatty chain) and hydrophilic (the charged head group) parts – is the foundation of its surfactant activity. In aqueous solutions, CTAC molecules self-assemble into micelles above a certain concentration (the critical micelle concentration, or CMC), which allows them to solubilize oils and greases, thus enabling cleansing actions.

The positive charge on the nitrogen atom is critical. It makes CTAC a cationic surfactant, enabling it to adsorb onto negatively charged surfaces. This is why it is so effective in hair care products: hair strands, especially when damaged, carry a negative charge. CTAC neutralizes these negative charges, smoothing the hair cuticle, reducing static electricity, and improving combability. This is a direct consequence of its chemical structure and electrostatic interactions.

Furthermore, the positively charged head group is believed to interact with the negatively charged cell membranes of microorganisms. This disruption can lead to leakage of cellular contents and ultimately cell death, explaining CTAC's antiseptic and preservative properties. This mechanism is common among many quaternary ammonium compounds and is vital for its use in disinfectants and product preservation. Researchers often buy CTAC for studies on micelle formation, drug delivery systems, and the interactions of charged molecules with biological surfaces.

Understanding the solubility and physical state of CTAC is also important for formulators. While the 99% pure form is a white powder with a melting point around 233-235°C, it is often supplied as a 50% pale yellow liquid solution for easier handling and incorporation into formulations. Its solubility in water is significant, allowing it to function effectively in aqueous-based products. As a supplier, we ensure that our CTAC meets rigorous purity standards, providing the consistent chemical properties necessary for reproducible results in research and development, as well as commercial product manufacturing.