PARAMETERS

USP

STANDARD

SAMPLE

REMARKS

Description

Practically odourless and tasteless, white, waxy, plastic material having a consistency similar to beeswax, or as creamy white flakes , beads, or powders, the congealing temperature is about 60?o:p>

Solubility

Freely soluble in water, soluble in acetone, in alcohol, in chloroform, in ethylene glycol monoethyl ether, in ethyl acetate, and in toluene. Insoluble in ether and in hexane?

Completeness and Color of Solution

A solution of 5g of PEG in 50ml of water is colorless and clear

Viscosity <911>

Between 470 to 900 Centistokes

Average molecular weight

Not less than 95.0% and not more than 105.0%

PH <791>

4.5 - 7.5, in a solution prepared by dissolving 5.0g PEG in 100ml of carbon dioxide-free water and adding 0.3ml of saturated potassium chloride solution

Residue on ignition?<281>

Not more than 0.1 % (in platinum dish)

Heavy metals <231>

The limit is 5 ppm

Organic volatile impurities Method IV <467>

Meets the requirements for chloroform, methylene chloride, and trichloroethylene