Description
Mono propylene glycol (MPG), also known as propylene glycol or PG, is a clear, colorless, viscous liquid with a subtle odor and a slightly sweet taste. It is highly soluble in water and has hygroscopic properties, meaning it can absorb moisture from the air. MPG is produced from propylene oxide through a process called hydrolysis.
Chemical properties
| Parameter | Specification |
| Purity (Assay) | ≥ 99.5% |
| Appearance | Clear, colorless liquid |
| Moisture Content | ≤ 0.2% |
| Specific Gravity @ 20°C | 1.035 – 1.038 |
| pH (5% aqueous solution) | 6.0 – 8.0 |
| Boiling Point | 188.2°C |
| Flash Point (Closed Cup) | 103°C |
| Odor | Odorless or mild |
Grades of MPG
1. USP/EP (United States Pharmacopeia/European Pharmacopoeia) Grade: This high-purity grade is suitable for applications where it may come into contact with humans or animals. It is used in:
Food and Beverage: As a humectant, solvent for flavorings and colorings, and stabilizer.
Pharmaceuticals: As an inactive ingredient (excipient) and solvent for active ingredients in oral, topical, and some injectable medications.
Cosmetics and Personal Care: As a solvent, humectant, and carrier in products like moisturizers, shampoos, and deodorants.
2.Industrial Grade: This grade is used for various industrial applications, including:
Antifreeze and De-icing: As a base fluid in coolants for engines and in de-icing fluids for aircraft and runways.
Chemical Intermediate: In the production of unsaturated polyester resins, which are used to make items like bathtubs and pipes.
Paints, Coatings, and Inks: As a solvent.
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