Esters of p-hydroxybenzoic acid such as methyl, ethyl, propyl and butyl, commonly known as parabens are widely used as preservatives in cosmetic and personal care (CPC) products because they have a broad-spectrum anti microbial activity, non -irritating and non-sensitizing. They are stable over wide pH range and are sufficiently soluble in water to produce the effective concentration in aqueous phase. Parabens have a good microbiocidal effect, however, they are more effective against yeast and mould than bacteria.

Main Research:  Suriati Hashim