Optiphen HD preservative booster is a global multifunctional additive. The 1,2-Alkanediol can be combined with very low doses of preservatives to effectively preserve personal care formulations acting as preservative potentiator. When used with other cosmetic ingredients it may work as an antimicrobial stabilizer. Based on 1,2- Hexanediol it can be used in a variety of cosmetic formulations. Optiphen HD is well known and liked in personal care applications due to its balanced way of boosting preservative activity and imparting emolliency while being active over a wide pH range (2-10). Optiphen HD is considered a very effective humectant.