7192-88-3

Basic information

• Product Name: Hexadecyl trimethyl ammonium iodide
• Synonyms: Hexadecyl trimethyl ammonium iodide
• CAS NO: 7192-88-3
• Molecular Formula: C19H42IN
• Molecular Weight: 411.44795
• Mol File: 7192-88-3.mol
• Article Data: 3

Chemical Properties

• Appearance: /
• CAS DataBase Reference: Hexadecyl trimethyl ammonium iodide(CAS DataBase Reference)
• NIST Chemistry Reference: Hexadecyl trimethyl ammonium iodide(7192-88-3)
• EPA Substance Registry System: Hexadecyl trimethyl ammonium iodide(7192-88-3)

Safety Data

• Hazardous Substances Data: 7192-88-3(Hazardous Substances Data)

Usage

General Description

Hexadecyl trimethyl ammonium iodide, also known as CTAB, is a quaternary ammonium compound with the chemical formula (C16H33)3N+I-. It is a cationic surfactant commonly used in various industrial and laboratory applications. CTAB is utilized as a biocide, antiseptic, and disinfectant due to its ability to disrupt cell membranes and inhibit bacterial growth. It is also used as a phase transfer catalyst in organic synthesis and as a stabilizing agent in nanoparticle synthesis. Additionally, CTAB is commonly employed in molecular biology and biochemistry as a DNA extraction and purification reagent. Despite its widespread application, CTAB poses environmental and health risks due to its toxic and corrosive nature, which requires careful handling and disposal.

Upstream product

• 57-09-0 cetyltrimethylammonim bromide 
• 544-77-4 1-iodohexadecane 
• 75-50-3 trimethylamine 
• 112-02-7 cetyltrimethylammonium chloride 

Relevant articles and documents

Controlled polymer grafting on single clay nanoplatelets

We report on the controlled chemical grafting of well-defined polymer chains onto individual montmorillonite-type clay nanoplatelets and the direct visualization of the formed hybrid material at the nanoscale level. Our approach is based on the use of a surfactant mixture that contains varying proportions of hydroxyl-substituted alkylammonium and unsubstituted alkylammonium cations to exchange the initial Na+ counterions of the natural montmorillonite. This allows for the exchange of Na+ by a tunable amount of hydroxyl functions at the surface of the clays. Those functions are then derivatized into aluminum alkoxides in order to initiate the ring-opening polymerization of ε-caprolactone directly from the clay surface that was swollen in an organic solvent. Atomic force microscopy measurements on the resulting polymer-grafted nanoplatelets demonstrate the strong dependence of the coating of the individual clay particles with the composition of the surfactant mixture used for the cationic exchange. This allows for the generation of a range of morphologies varying from polymer islands distributed over the clay surface to homogeneous polymer layers thoroughly coating the platelets. Finally, the control that is achievable over the synthesis of this new family of organic-inorganic nanohybrid materials has been extended to the surface grafting of semicrystalline poly(ε-caprolactone)-poly(lactic acid) diblock copolymers with defined compositions.

Supramolecular Assemblies as Promoters of Iodohydrin Formation

Finding alternative reaction media to replace polluting organic solvents is one aim of green chemistry. The ultimate green solvent, water, is the cheapest, non-toxic and most readily available reaction medium: three properties which make it an environmentally and economically attractive solvent. However, a fundamental problem in performing reactions in water is that many organic substrates are hydrophobic and not soluble in water. Several approaches are possible in solubilizing these compounds in aqueous media, one of which is carrying out reactions in aqueous solutions of surfactants at concentrations above their critical micellar concentration (cmc). Reactions of iodine with cyclohexene, 1-octene and styrene in water or in the presence of cationic surfactants do not give useful amounts of iodohydrins, but reactions in anionic surfactants give good yields. Iodohydrins are important functionalizable compounds and are readily prepared in the presence of sodium dodecyl sulfate (SDS) or sodium N-dodecanoyl sarcosinate (SANa). The critical conditions for these reactions were optimized with a rigorous statistical approach, the experimental design method. Use of these newly optimized reaction conditions gave high yields in short times for all of the alkenes examined. The use of anionic surfactants in water to form iodohydrins is a valid alternative to methods previously described. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.