Propylene glycol Ph.Eur 25LT Go Back


: 57-55-6

Molecular Formula

: C3H8O2

Molecular Weight

: 76.1
Appearance: A viscous, clear, colourless, hygroscopic liquid.
Solubility: Miscible with water and with ethanol (96%).
Identification A ( By Relative density, 20°C): 1.035 - 1.040
Identification B (By Refractive index, 20±0.5°C): 1.431 - 1.433
Identification C (By Boiling Point): 184° - 189°C
Identification D (By melting point): Crystals should melt between 121 °C to 128 °C.
Relative density, 20°C: 1.035 - 1.040
Refractive index (20°C ± 0.5°C): 1.431 - 1.433
Acidity: Not more than 0.05 mL of 0.1 M sodium hydroxide should require to change the color of the indicator to blue.
Oxidising substances: Not more than 0.2 mL of 0.05 M sodium thiosulfate should require.
Reducing substances: The solution does not change its appearance.
Water: NMT 0.2%
Sulphated ash: NMT 0.01% (Residue weight should not be more than 5 mg
Appearance of solution: Clear and colorless.
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