Dipropylene Glycol (DPG), identified by CAS number 25265-71-8, is a high-purity, colorless, and practically odorless liquid with a high boiling point and low volatility. Chemically, DPG is a mixture of three isomeric structural compounds: 4-oxa-2,6-heptanediol, 2-(2-hydroxypropoxy)propan-1-ol, and 2-(2-hydroxypropyl)oxypropan-1-ol. It is produced as a co-product during the pressurized hydrolysis of propylene oxide, alongside monopropylene glycol (MPG) and tripropylene glycol (TPG).
DPG is characterized by its bifunctional nature as an alcohol, offering excellent solvency for both water-soluble and oil-soluble substances. Due to its low toxicity and exceptional stability, it serves as a critical component in sensitive industries. It is primarily available in two grades: Fragrance Grade, which undergoes additional purification to ensure minimal odor interference, and Industrial Grade. As a versatile intermediate and solvent, DPG bridges the gap between aqueous and organic phases, making it indispensable in formulations ranging from high-end perfumes to heavy-duty industrial resins.
* High purity suitable for sensitive fragrance and cosmetic formulations.
* Features low odor and a favorable low toxicity profile for enhanced safety.
* Provides excellent solvency for a wide range of organic substances.
* Acts as an effective humectant, aiding in moisture retention within products.
* Serves as an ideal carrier and diluent for fragrances and cosmetic ingredients.
* Its low volatility contributes to product stability and extended shelf life.
* Functions as an excellent co-solvent, efficiently blending oil and water-based components.
* Offers good chemical stability and low viscosity for easy processing and handling.
* Appearance: Clear, colorless liquid
* Purity, % w/w: 99.0 min
* Water, % w/w: 0.10 max
* Acidity (as Acetic Acid), % w/w: 0.005 max
* Specific Gravity @ 20°C: 1.020 – 1.025
* Color, Pt-Co: 10 max
* Diethylene Glycol, % w/w: 0.50 max
* Tripropylene Glycol, % w/w: 0.50 max
* Hydroxylic Value, mg KOH/g: 650-665
* Refractive Index @ 20°C: 1.441-1.442
* Serves as an excellent solvent and carrier for fragrances and flavors, widely used in perfumes, air fresheners, and as a flavor diluent.
* Functions as a humectant, solvent, and emollient in personal care products like cosmetics, lotions, creams, and hair care formulations.
* Utilized as a versatile industrial solvent for resins, dyes, and inks, and as a key component in brake fluids and anti-freeze formulations.
* Acts as a crucial chemical intermediate, serving as a raw material in the production of polyurethanes, plasticizers, and unsaturated polyester resins.
* Employed in specialized heat transfer fluids due to its high thermal stability and low corrosivity.
* Incorporated into textile processing as a lubricant and processing aid, enhancing fabric treatment and handling.
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