Test Items

    Technical Index

Test method

RESULTS

Appearance

White crystalline powder or granular powder; Odorless or almost odorless, taste bitter

Visual and smell

Conform

Identification A

Conform

IR

Conform

Identification B

(Ratio:A245/A262)

0.63～0.67

UV

0.65

Assay, %

98.5～101.5

HPLC

99.7

Melting Point,℃

128～131

Melting point apparatus

129.2～129.6

Loss on drying,%

≤0.50

Silica gel drier

0.11

Heavy metals,%

≤0.003

Colorimetry

＜0.003

Residue on ignition,%

≤0.1

High temperature ignition

0.05

Readily carbonizable

substances

Conform

Colorimetry

Conform