propanediols
Propanediols are chemical compounds in which two hydroxyl groups are attached to a three-carbon chain. The term commonly refers to two structural isomers: 1,2-propanediol (propylene glycol) and 1,3-propanediol (trimethylene glycol). Both are colorless, hygroscopic liquids that mix well with water and have relatively high boiling points for small alcohols.
1,2-Propanediol is widely used as a solvent and humectant in cosmetics, pharmaceuticals, and foods, and as an
Production methods for propanediols vary. 1,2-propanediol is typically produced by the catalytic hydration of propylene oxide,
Safety and environmental considerations are generally favorable for propanediols in moderate use. They have relatively low