| ≥1 piece |
|
Name of index
|
GB1889-2004
|
FCC-IV
|
|
Appearance
|
White powder
|
White powder
|
|
Content £¨ As CaHPO4·2 H2O £?£? %
|
98.0 ?? 103.0
|
97.0 ?? 105.0
|
|
Loss on ignition £? %
|
2 4.5 ?? 26.5
|
2 4.5 ?? 26.5
|
|
Heavy metal £¨ As Pb £?£? %
|
≤0.001
|
≤0.0015
|
|
Pb, %
|
≤0.0005
|
≤0.0002
|
|
Arsenic (As) £? %
|
≤0.0002
|
≤0.0003
|
|
Fluorides £¨ As F £?£? %
|
≤0.005
|
≤0.005
|
|
Acid-insoluble Substances £? %
|
≤0.05
|
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|