Propylene Glycol USP

Propylene Glycol USP

CAS Number:57‑55‑6

Synonyms:Propylene glycol; 1,2‑propanediol; PG USP; E‑grade USP/FCC

Chemical Formula:C₃H₈O₂

Molecular Weight:76.09 g/mol

Product Introduction

A clear, colorless, nearly odorless, slightly viscous, water-soluble, hygroscopic liquid of pharmaceutical-grade (compliant with USP/EP/FCC). Commonly used in pharma, food, cosmetics, personal care, and industrial applications.

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Physical & Chemical Properties

Property Value
Assay ≥ 99.5% by GC
Specific Gravity (25 °C) 1.035–1.037
Water Content ≤ 0.2%
Acidity (as acetic) ≤ 0.002–0.05 wt%
Chlorides (ppm) ≤ 0.5–1 ppm
Heavy Metals (Pb ppm) ≤ 1–5 ppm
Color (Pt‑Co Units) ≤ 10
Odor & Appearance Colorless, free of particles, odorless

Applications

  • Pharmaceutical excipient: syrups, tablets, injectables (non‑IV), topicals
  • Cosmetics & personal care: humectant, viscosity modifier, solvent
  • Food & flavor: carrier, plasticizer (FCC‑grade)
  • Industrial uses:antifreeze, de‑icer, smoke/fog fluid, resin and polymer production

Safety Notes

  • Low acute toxicity (oral LD₅₀ ~20 g/kg in rats). Non‑irritant, non‑carcinogenic. Combustible; store sealed in ventilated area. Use standard PPE.

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