| ≥1 piece |
|
Item |
Specification |
results |
|
|
Sensory Indexes |
Appearance |
Colorless crystals or white crystaliine powder |
Colorless crystals or white crystaliine powder |
|
Impurities |
No |
NO |
|
|
Physicochemical Indexes |
Assay （as Dry Basis ）% |
99.0~101.0 |
99.47 |
|
Melting Range,℃ |
132.0~135.0 |
132.2~135.0 |
|
|
Water，% ≤ |
0.5 |
0.23 |
|
|
Residue on ignition ，%≤ |
0.2 |
0.02 |
|
|
Hygienic Indexes |
Heavy Metals (as Pb)，ω(mg/kg) ≤ |
10 |
＜10 |
|
Arsenic(asAs),ω/(mg/kg) ≤ |
2 |
＜2 |
|