Glycerin

Glycerin

CAS Number:56‑81‑5

Synonyms:Glycerin; Glycerol; 1,2,3‑Propanetriol; Propanetriol

Chemical Formula:C₃H₈O₃

Product Introduction

Glycerin is a colorless, odorless, sweet-tasting, viscous liquid. Highly hygroscopic and miscible with water and alcohols, it’s widely used across industries—from food and pharma to cosmetics, personal care, and polymers.

Physical & Chemical Properties

Property Value
Appearance Colorless, viscous liquid; solidifies below ~17–18 °C
Odor Odorless; sweet taste
Molecular Weight 92.09 g/mol
Density @ 20 °C ~1.261 g/cm³
Melting Point ~17.8 °C
Boiling Point 290 °C (decomposes)
Vapor Pressure @ 20 °C < 1 mm Hg
Refractive Index (n₂₀ᴅ) ~1.474
Solubility Miscible with water, alcohols; partial in ether/EtOAc
Vapor Density ~3.1 × air

Applications

  • Food & beverages: Humectant, sweetener, texture stabilizer (E422).
  • Pharma & cosmetics: Solvent, emollient, preservative in formulations; topical wound care.
  • Industrial/chemical: Precursor to alkyd resins, nitroglycerin, antifreeze; solvent in biodiesel analysis.
  • Laboratory: Standard reagent, cryoprotectant, HPLC solvent.

Safety & Handling

  • Flammable solid (UN 1334, Class 4.1 PG III); moderate toxicity, possible carcinogen (IARC 2B)
  • TLV–TWA: 10 ppm; STEL: 15 ppm; IDLH: 500 ppm
  • Store below 30 °C in a cool, ventilated area; control dust and fume exposure
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