Dipropylene glycol is produced as a byproduct of the manufacture of propylene glycol. It works well as a solvent of essential and fragrance oils. We recommend approximately 15-25% essential or fragrance oil with 75-85% dipropylene glycol. Dipropylene glycol is not acutely toxic by oral, dermal, or inhalation exposure.

Dipropylene glycols low toxicity and solvent properties make it an ideal additive for perfumes, reed diffusers and skin and hair care products. It is also a common ingredient in commercial fog fluid, used in entertainment industry smoke and haze machines.

Further safety data can be found on this pdf from INCHEM with information provided by OECD SIDS (Organisation for Economic Co-Operation and Development’s Existing Chemical Database) and United Nations Environment Program.