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Specification | ||||||||||||
Appearance | White powder | White needle | ||||||||||
Active matter % | ≥92 | ≥93 | ≥95 | ≥92 | ≥93 | ≥95 | ||||||
Petroleum ether soluble substances % | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ||||||
Inorganic salts (NaCl+Na2SO4) % | ≤5.5 | ≤4.5 | ≤2.5 | ≤4.5 | ≤3.5 | ≤2.0 | ||||||
Water % | ≤2.5 | ≤2.5 | ≤2.5 | ≤3.5 | ≤3.5 | ≤3.0 | ||||||
pH (1% aqs) | 7.5~9.5 | 7.5~9.5 | 7.5~9.5 | 7.5~9.5 | 7.5~9.5 | 7.5~9.5 | ||||||
Whiteness (WG) | ≥90 | ≥90 | ≥90 | ≥90 | ≥90 | ≥90 |