Dipropylene Glycol (DPG) comes in two grades: fragrance grade and industrial grade. Dipropylene glycol, fragrance grade is commonly used as a carrier for fragrances. Dipropylene glycol, industrial grade (DPG), with almost identical properties, is frequently used in resins and cleaner formulations where low odor is not as critical.
Benefits and Applications
DPG and DPGF are excellent fragrance carriers. They exhibit good cosolvency with water, soap bases, oils, and hydrocarbons. DPG lo is panel selected to ensure its low odor and is of superior quality due to batch-to-batch consistency of isomer distribution.
Toxicology/Regulatory
DPG has a relatively low hazard profile, based on a substantial toxicity database which has been summarized by the Cosmetic Ingredient Review Expert Panel.
Storage and Handling
Due to its low vapor pressure, toxicity and flammability, DPG presents no special handling problems. However, overexposure or spillage should be strictly avoided as a matter of good safety practice. DPG may require storage facilities designed to prevent moisture intrusion because of its hygroscopic nature. Storage vessels and transfer lines of mild steel may be used if slight increases in color and trace iron levels are not objectionable. Stainless steel and/or mild steel vessels with baked phenolic or epoxy-phenolic linings are recommended to promote long-term storage and to maintain high quality.