Polyethylene glycol 400 USP-NF/Ph.Eur PARENTEX PLUS 500ML Go Back


: 25322-68-3

Molecular Formula


Molecular Weight

: 380-420
Appearance: Clear to slightly hazy, colourless or practically colourless, slightly hygroscopic viscous liquids, having a slight characteristic odour, and a specific gravity at 25°C of about 1.12
Solubility: Miscible with water, soluble in acetone, in alcohol, in chlororform, in ethylene glycol monoethyl ether, in ethyl acetate , in toluene, in methylene chloride,practically insoluble in fatty oils and in mineral oils. Insoluble in ether and in hexane
Identification A (By Viscosity): Kinematic viscosity should be between 94 &116 mm2.S-1 and dynamic viscosity should be between 105-130 mPa.s at 20°C
Identification B (By Chemical test): An abundant, white, crystalline precipitate is formed.
Identification C (By Chemical test): The liquid phase becomes blue.
Appearance of solution: The solution is clear and not more intensely coloured than reference solution BY6.
Completeness and colour of solution: clear solution
Assay: 95.0%-105.0% (Average molecular weight, 380-420)
Acidity or alkalinity: NMT 0.1ml of 0.1M sodium hydroxide should required to change the colour of the indicator to blue.
Viscosity: 6.8-8.0 Centistokes
Kinematic Viscosity: 94 - 116 mm2.s-1
Dynamic Viscosity: 105 - 130 mPa.s
Hydroxyl value: 264-300
Reducing substances: The solution is not more intensely coloured than reference solution R3.
Formaldehyde: NMT 30ppm
Ethylene glycol and Diethylene glycol: NMT 0.25% (Sum of ethylene glycol & diethylene glycol)
Ethylene oxide: NMT 1ppm
Dioxan: NMT 10ppm (10 µg/g)
Water: NMT 2.0%
Residue on ignition: NMT 0.1%
pH: 4.5-7.5
Total aerobic microbial count: NMT 100 CFU/ml
Total Yeast & mold count: NMT 10 CFU/ml
E.coli: should be absent/ml
Staphylococcus aureus: should be absent/ml
Pseud. aeruginosa: should be absent/ml
Bile-tolerant gram negative bacteria: should be absent/ml
Becterial endotoxins test: NMT 2.5 EU/ml
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