ITEM

STANDARD

Appearance

White or pale-white crystalline powder

Identification

The retention time of the major peak of the sample solution corresponds to that of the standard solution.

Heavy metal

＜10ppm

Loss on drying

＜0.5%

Residue on ignition

＜0.1%

PH

5.0-7.0

Melting range

203~206℃

Specific optical rotation

【α】D²⁰ =+176~184º

Hydroquinone

≤10 ppm

Total Plate Count

<1000 cfu/g

Yeasts & Molds

<100 cfu/g

E.Coli

Negative

Salmonella

Negative

Assay(HPLC)

≥99.0%