Description
DPG” -Dipropylene glycol is a colorless, nearly odorless, slightly viscous liquid. It’s a chemical compound with the formula C6H14O3.
Chemical Properties
| Property | Description / Value |
| Chemical name | Dipropylene Glycol |
| Abbreviation | DPG |
| Chemical formula | C₆H₁₄O₃ |
| Molecular weight | 134.17 g/mol |
| Chemical class | Glycol (polyol) |
| Appearance | Colorless, clear liquid |
| Odor | Mild, characteristic |
| pH (10% aqueous solution, 25 °C) | Neutral (≈ 6.5 – 7.5) |
| Solubility in water | Completely miscible |
| Solubility in alcohol | Miscible |
| Solubility in oils | Slightly soluble |
| Hygroscopic nature | Hygroscopic |
| Boiling point | ~230 °C |
| Flash point | ~138 °C (closed cup) |
| Vapor pressure | Low |
| Chemical reactivity | Generally stable |
| Oxidizing/reducing nature | Neither oxidizing nor reducing |
| Functional groups | Hydroxyl (–OH) groups |
| Stability | Stable under normal conditions |
| Incompatibilities | Strong oxidizing agents |
Grades and Purity
To cater to various industry requirements, DPG is typically offered in different grades:
Fragrance Grade (or Lo+): This is a high-purity, distilled product with an exceptionally low odor. It is specifically designed for use in sensitive applications like perfumes, cosmetics, and personal care products where the odor of the solvent must not interfere with the final product’s fragrance.
Industrial Grade: This grade is suitable for a wide range of industrial applications where odor is not a critical factor. It is used as a solvent and intermediate in various manufacturing processes.Both grades typically have a purity of at least 99.5% by weight.
Uses
Cosmetics and Personal Care: Used as a solvent, humectant, and carrier in products like perfumes, moisturizers, deodorants, and hair care products.
Chemical Intermediate: A vital component in the production of unsaturated polyester resins (UPR), polyurethane polyols, and other resins.
Paints, Coatings, and Inks: Serves as a solvent and coupling agent to improve the performance and finish of a wide range of formulations.
Functional Fluids: Used in industrial and automotive applications as a base fluid for heat transfer, antifreeze, and hydraulic brake fluid formulations.
Other Applications: DPG is also found in de-icing fluids, cutting oils, and as a solvent for agricultural chemicals.
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