Item

Standard

Resulte

Description

White or analogous white crystailine powder

Conforms

Related substance

≤1.0%

＜1.0%

Heary metals

≤10ppm

＜10ppm

Arsenci

≤1ppm

＜1ppm

Residue on lgnition

≤0.1%

0.06%

Loss on drying

≤0.5%

0.15%

Tretinoin

≤5.0%

＜1.0%

Assay

≥98.0%

99.1%

Total plate counmt

≤1000CFU/g

＜100CFU/g

Moulds+yeasts

≤100CFU/g

＜10CFU/g

Escherichia Coli

Negative in 10g

conformed

Salmonella spp.

Negative in 25g

conformed