Monograph of Liquid Glycerin (Part I)

• Formula: (HOCH2)2CHOH

• Physical characteristics: odorless, thick, and clear liquid with a sweet taste

• CAS number: 56-81-5

• NIH PubChem CID: 753

• Molar mass: 92.09 g. mol-1

• Density: 1.261 g/cm3 (20°C)

• Vapor pressure: 0.0002 mmHg (25°C)

• Vapor density: 3.17 (air=1)

• Boiling point: 290°C

• Melting point: 18°C

• Viscosity: 954 cp (20°C)

• Surface tension: 64.8 g/s2 (20°C)

• Refractive index: 1.4758 (20°C)

• Saturation concentration: 0.0003% (50°C)

• Dipole moment: 2.617

• Dielectric constant: 41.01 (23°C)

• pKa/pKb: 13.52 (pKa)

• Critical temperature: 577°C

• Critical pressure: 74.02 mmHg

• Partition coefficient: -1.76 pKow

• Heat of fusion: 18.3 kJ/mol

• Heat of vaporization: 61.4 kJ/mol

• Heat of combustion: -1663 kJ/mol

• Flash point: 199°C

• Autoignition: 370°C

Storage: 

Liquid glycerin absorbs moisture easily, so it should be stored in a tightly closed container and protected against incompatible substances. When not in use, store it in a cool, dry, and well-ventilated area.

Handling: 

Wash hands thoroughly before and after handling the substance.  Use liquid glycerin in an adequately ventilated room and wear protective clothing. Avoid body contact, ingestion, and inhalation. Clothing tainted with the substance should be washed well before reuse. In case of spillage, absorb spills with materials like dry sand or earth before disposing in a chemical waste bin. Clean up spills immediately and dispose properly.