Packaging Material: | Paper Box/Drum |
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Storage Method: | in Dark and Dry |
Shelf Life: | 2 Years, Three Years When Properly Stored |
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Testing Item | Standard | Result |
Appearance |
White crystals or crystalline powder |
White crystalline powder |
Assay (on anhydrous basis) | 98.0% ~ 102.0% | 99.7% |
Appearance of solution | Clear, not more intense than Y7 or GY7 | Clear, not more intense than Y7 |
Appearance of solution | Clear, not more intense than Y7 | Conformss |
PH | 2.7 ~ 3.3 | 3.2 |
Water | ≤ 5.0% | 3.44% |
Sulphates | ≤ 0.03% | <0.03% |
Residue on ignition | ≤ 0.1% | 0.01% |
Absorbance of solution | ≤ 0.025 | 0.012 |
Limit of nitrate |
No brown ring is produced at the junction of the two layers |
No brown ring is produced at the junction of the two layers |
Related compounds | ≤ 1.0% | 0.02% |