Item

Quality standard

Appearance

white crystal or crystalline powder

Identification

Identification (1), (2) all appear positive reaction

Solution clarity

10% aqueous solution should be clear

PH value

PH value of 10% aqueous solution should be 6.0~8.0

Drying Loss

≤ 0.5%

Heavy metal

≤ 10PPM

Assay(C₆H₉NaO₇·H₂O)

98.0~102.0%