外观

Practically odorless, white to off-white powder

鉴别
•  红外
•  变色测试
•  液相

Concordant with WS. On heating, Violet vapour evolves The retention time of the major peak in the chromatogram of the sample solution corresponds to that observed in the chromatogram of the S.S.solution

比旋度
(40% solution in water)

- 4.6°~ - 5.2°

干燥失重

Not more than 0.5%

灼炽残渣

Not more than 0.1%

游离芳香胺

Not more than 200 ppm

游离碘

No red colour

游离碘化物

Not more than 0.001%

游离酸或碱

Acid not more than 5mg of HCL equivalent.
Alkali not more than 3mg of NaOHequivalent

重金属

Not more than 0.001%

有关物质

Not more than 0.25%

含量

98.0% ~ 101.0%