Items

Requirements

Results

Description

White powder or off-white powder,no visible impurity.

Conformity 

Identification

   Λmax=280±2nm

 A250 / A260 = 0.40~0.52

A280 / A260 = 1.85~2.20

        279.9nm

A250 / A260 = 0.43

      A280 / A260 = 2.12

pH

8.0~9.5

           8.9

Clarity and color of solution

Clear and colorless

Conformity

Water content

≤26.0%

17.2%

Heavy metal

≤10ppm

 Conformity

Arsenic

≤1.5ppm

       Conformity

Ammonium

≤0.02%

       Conformity

Purity(HPLC)

≥98.0%

      99.1%

Bacteria

≤300CFU/g

      110CFU/g

Assay(on dry basis)

97.0%~102.0%

100.3%