Propylene Glycol

CAS NO. 57-55-6

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Product Name	Propylene Glycol (PG / MPG) (1,2-Propanediol / Monopropylene Glycol USP/EP)
CAS NO.	57-55-6
Formula & Weight	C₃H₈O₂ (MW: 76.09)
Chemical Structure
Specification (USP/EP)	Appearance: Colorless, viscous, transparent liquid Assay (GC): ≥ 99.85% (Exceeds standard 99.5%) Color (Pt-Co): ≤ 10 (Water White) Moisture: ≤ 0.2% Acidity (as Acetic Acid): ≤ 0.01% Heavy Metals (Pb): ≤ 5 ppm (Food/Pharma Safe) Specific Gravity (20℃): 1.035 - 1.038
Key Applications	A versatile high-purity glycol suitable for regulated and industrial sectors: Unsaturated Polyester Resins (UPR): The reactant for high-performance fiberglass resins (marine, construction). High purity ensures consistent polymerization and reduced yellowing. Pharma & Food (USP/E1520): Safe solvent for oral, topical, and injectable drugs. Humectant and carrier for food flavors, colors, and vape liquids. Personal Care: Effective moisturizer and solvent in skincare, shampoos, and fragrances. Industrial Thermal Fluids: Non-toxic antifreeze and heat transfer fluid for food processing plants (HVAC) and aircraft de-icing, replacing toxic Ethylene Glycol.
Packaging & Storage	Packaging: Steel Drum / 1000kg IBC Storage: Hygroscopic. Store in a cool, dry place. Shelf life: 1-2 years.