Quaternium-14 (inci)

Quaternium (see also Polyquaternium) is a particularly prominent group of complex ammonium compounds, which are also called quats under the generic term "quaternary ammonium compounds". Quaternary ammonium compounds, i.e. also quaternium (and polyquaternium) have a quaternary nitrogen atom, i.e. a nitrogen atom in which all four hydrogen atoms are replaced by organic radicals. In contrast to polyquaternium (polymers, consist of several quats) they are monomeric molecules.

Quaternium-14 is used in cosmetic formulations. The compound has an antimicrobial effect (inhibits the growth of microorganisms, as antistatic agent (reduces electrostatic charges e.g. of the hair), hair conditioning agent (makes the hair easier to comb, smooth, soft and shiny and gives it volume) and as surfactant (washing-active substance/improves the even distribution of the products during application).

1. Ko S et al (2009) The effect of cationic polymer treatment on adhesion of iron oxide to eyelashes. J Cosmet Sci 60:617-626.
2. Wu W et al (2001) Quantitative methods for evaluating optical and frictional properties of cationic polymers. J Cosmet Sci 52:51-65.