Test Standard

Enterprise Standard

ITEMS

CRITERIA

Appearance

White or almost white powder;Odorless, slightly sweet;Freely soluble in water,soluble in ethanol,

almost insoluble in acetone.

Water solution pH

pH5.0~8.5

Light-absorbing impurities

Between 230 and 350 nm,the absorbance is NMT 0.5; and between 350 and 660 nm, the absorbance is NMT 0.5.

Water

≤10.0%

Alpha Cyclodextrin

≤1.5%

Residue on ignition

≤0.2%

Heavy Metal

≤10ppm

Propylene glycol

≤0.5%

Assay

≥95%

Hydroxypropoxyl content

17.5%~29.1%

The total aerobic microbial count

≤1000cfu/g

The total combined moulds and yeasts count

≤100cfu/g

Escherichia coli

Absence

Bacterial Endotoxins Test

According to preparation needs

Packaging and storage

Preserve in well-closed containers.