Quality Parameters of Food-Grade Propylene Glycol

The quality parameters of food-grade propylene glycol mainly include purity, physical properties, and safety standards:

Purity

Food-grade propylene glycol generally reaches a purity of over 99.9%.

Physical Properties

- Appearance: Colorless transparent liquid

- Density: 1.036-1.040 g/mL (at 20°C)

- Boiling point: 187°C (literature value)

- Solubility: Miscible with water, ethanol, and various organic solvents

Safety Standards

- Toxicity: The LD50 for intravenous injection in rats is 7000-8000 mg/kg. Oral toxicity is relatively low, but excessive intake may cause kidney damage.

- Storage: Should be sealed and stored in a cool, dry place, away from open flames.

Scope of Application

Food-grade propylene glycol is mainly used in food additives,  medicine solvents, surfactants, emulsifiers, etc. It meets national standards and must strictly comply with usage limits.