Cetyltrimethylammonium hydrogen sulfate

• CAT Number: E000019
• CAS Number: 68214-07-3
• Molecular Formula: C₁₉H₄₂N.HO₄S
• Molecular Weight: 381.61
• Purity: ≥95%
• Synonyms: 1-Hexadecanaminium, N,N,N-trimethyl-, sulfate (1:1)
• IUPAC Name: hexadecyl(trimethyl)azanium;hydrogen sulfate
• InChI: InChI=1S/C19H42N.H2O4S/c1-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20(2,3)4;1-5(2,3)4/h5-19H2,1-4H3;(H2,1,2,3,4)/q+1;/p-1
• InChIKey: UCRJJNVFJGKYQT-UHFFFAOYSA-M
• SMILES: CCCCCCCCCCCCCCCC[N+](C)(C)C.OS(=O)(=O)[O-]

Cetyltrimethylammonium hydrogen sulfate（Cat No.:E000019）is a quaternary ammonium salt composed of a cetyltrimethylammonium cation and a hydrogen sulfate anion. This compound functions as a cationic surfactant, combining a long hydrophobic alkyl chain (cetyl group) with a hydrophilic, strongly acidic counterion. It is widely used in phase-transfer catalysis, emulsification, and nanoparticle synthesis due to its ability to stabilize micelles and promote solubilization of organic and inorganic species. In chemical reactions, it facilitates interactions between aqueous and organic phases. Its surface-active properties also support applications in cosmetics, detergents, and material functionalization.