Propylene Glycol
Propylene Glycol
Chemical Formula: C?H?O?
Molecular Weight: 76.09 g/mol
Description:
Propylene Glycol (PG) is a clear, colorless, odorless, and slightly viscous liquid with a faintly sweet taste. It is a stable, hygroscopic compound completely miscible with water, alcohol, and many organic solvents. PG is widely used as a solvent, humectant, antifreeze agent, and chemical intermediate in food, pharmaceutical, cosmetic, and industrial applications. It is recognized for its low toxicity and excellent safety profile compared to ethylene glycol.
Applications
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Food & Beverage Industry: Used as a humectant, flavor carrier, and preservative in food and drink formulations (food-grade PG).
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Pharmaceuticals & Cosmetics: Functions as a solvent, moisturizer, and stabilizer in medicines, creams, lotions, and personal care products.
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Antifreeze & Coolants: Serves as a safer alternative to ethylene glycol in engine coolants and heat transfer fluids.
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Tobacco & E-Liquid Industry: Used as a carrier for flavors and nicotine in vapor products.
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Chemical Manufacturing: Acts as a raw material in the production of unsaturated polyester resins and plasticizers.
Key Properties
| Property | Description |
|---|---|
| Appearance | Clear, colorless, viscous liquid |
| Odor | Practically odorless, faintly sweet |
| Solubility | Completely miscible with water, alcohol, and most organic solvents |
| Purity (Assay) | ≥ 99.5% |
| Boiling Point | ~188°C |
| Freezing Point | ~−59°C |
| Density | ~1.036 g/cm³ at 20°C |
| Viscosity | ~60 mPa·s at 25°C |
| Flash Point | ~99°C (Closed Cup) |
| Grade | USP / Food / Industrial |
| Packaging | 215 kg HDPE drums / IBC tanks / bulk tankers |
| Storage | Store in tightly closed containers in a cool, dry, well-ventilated area. Keep away from heat, moisture, and oxidizing agents. |
