Propylene Glycol – PG is a derivative of propylene oxide (PO) and is produced in a two-step process. The first step is the reaction of PO with water into a mixture of Monopropylene glycol and Dipropylene glycol and the second step is the distillation and purification of the mixture into its two separate components (Mono- and Dipropylene glycol). It is a colorless, viscous and odorless liquid. It is highly hygroscopic and miscible in all ratios with water, alcohols, esters, ketones and amines. It has limited miscibility with halogenated hydrocarbons and is not miscible with aliphatic hydrocarbons.
1ColorClear liquidClear liquid
2Density1.030 Min1.035kg/m3
3Flash Point85 Min88°C
4Boiling Point180 Min183°C
5Pour Point-50 Min-59°C
6Molecular Weight75 Min77
7Chemical FormulaC3H8O2C3H8O2