Items

Requirements

Description

White crystalline powder

Identification

                                  A250/A260=0.70~0.80

                                 A280/A260=0.32~0.38

                                    λmax=262±2nm

Clarity&color of solution

                                  Clarifying ,colorless

Specific rotation

＋6.0~＋10.0°

                                 Loss on drying

≤0.5%

Residue on ignition

≤0.10%

Heavy metals

≤0.001%

 Purity(HPLC)

≥98.0%

Assay（on dry basis）

98.0~102.0%