| ≥1 piece |
Quality standard:(GB1889-92FCC-IVUSP-23)
|
Name of indexes |
GB1889-2004 |
FCC-IV |
USP-23 |
|
Appearance |
White powder |
White powder |
White powder |
|
Assay (as CaHPO4.2H2O),% |
98.0-103.0 |
97.5-105.0 |
97.0-105.0 |
|
Fluoride, ≤% |
0.005 |
0.005 |
0.005 |
|
Loss on ignition, % |
24.5-26.5 |
24.5-26.5 |
24.5-26.5 |
|
Heavy metals(as Pb), ≤% |
0.001 |
0.0015 |
0.0015 |
|
Pb, ≤% |
0.0005 |
0.0002 |
0.0002 |
|
As, ≤% |
0.0002 |
0.0003 |
0.0003 |
|
Insolubles in Hydrochloric Acid ≤% |
0.05 |
- |
0.02 |
|
Chloride ≤% |
- |
- |
0.25 |