|
Item
|
Specification
|
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|
Appearance
|
White Powder Form
|
White Needle Form
|
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|
Active ingredient (%)
|
≥93
|
≥96
|
≥93
|
≥96
|
|
Petroleum ether soluble substances (%)
|
≤1.5
|
≤1.5
|
≤1.5
|
≤1.5
|
|
Inorganic salts (NaCl+Na2SO4) (%)
|
≤4.5
|
≤2.5
|
≤3.5
|
≤1.5
|
|
Water (%)
|
≤2.5
|
≤2.5
|
≤3.5
|
≤3.5
|
|
pH (1% aq. solution)
|
7.5~9.5
|
7.5~9.5
|
7.5~9.5
|
7.5~9.5
|
|
Whiteness (WG)
|
≥90
|
≥90
|
≥90
|
≥90
|
