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Characteristics：White crystalline powder
Identification：Infrared Spectrophotometry reaction of physico-chemical
Appearance of Solution：Conforms
Heavy metals：< 10 ppm
Salicylic acid：The absorbance is not greater than 0.115
Related substances：The absorbance is not greater than 0.125
Water：<0.1%
Na：<0.1%
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