分子量:118.17 Cas No:6920-22-5

1,2一己二醇( 1, 2-Hexanediol )。這種多元醇,目前未列人防腐劑,而是定義為保濕劑、滲透助劑。添加量在5%左右,就具有明確的防腐效果。所以,品牌大多拿這樣的成分,替代防腐劑,並聲稱無防腐劑配方。但這一類成分的製菌效果較為消極,對開封后使用期間的是否汙染較無法掌握。開封后的防腐環境,與密封時的防腐環境,有非常大的不同。也因此,無防腐劑的產品,保存期限趨向保守。


https://www.truthinaging.com/ingredients/hexanediol-12-hexanediol: According to a patent filed by Proctor and Gamble, Hexanediol and 1,2-hexanediol is a highly effective and mild coupling agent and humectant. It is especially useful when bonding silicone products and can be used at lower concentrations than many other coupling agents, therefore reducing its irritation likeliness.
1,2-hexanediol contains many chemicals in its composition, including: Alpha-Lipoic acids, an antioxidant; Chrysin, a anti-inflammatory bioflavonoid; Diosgenin, a maintainer of healthy blood cholesterol levels; Glucosamine Hydrochloride, which slows joint degeneration; and Indole-3-Carbinol, a nutrient that may prevent cancer (Source).


Pentylene Glycol, 1,2-Hexanediol and Caprylyl Glycol are all soluble in water, with water solubility increasing with decreasing carbon chain length. Although Caprylyl Glycol and Pentylene Glycol have been reported to have some antimicrobial activity, these ingredients may also serve to increase the antimicrobial activity of other preservatives. Pentylene Glycol, 1,2-Hexanediol and Caprylyl Glycol are 1,2-glycol compounds that vary only by the number of carbons. Each of these compounds has a hydroxyl group (-OH) on the first and second carbons. Pentylene Glycol has 5 carbons, 1,2-Hexandiol has 6 carbons and Caprylyl Glycol has 8 carbons in the carbon chain. In cosmetics and personal care products, these ingredients may be used in baby products, bath products, eye makeup, cleansing products, skin care products and hair care products.


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