| ITEM | SPECIFICATION |
| Appearance | White crystalline powder |
| Purity | >= 99.0% |
| Melting point | 125- 128 |
| Residue on ignition | =< 0.1% |
| Acidity (mg/g) | 4.0- 7.0 |
| Related substances | =< 0.5% |
| Identification | Conform |
| Clarity of solution | Clear and transparent |
| Heavy metal (as Pb) | =< 10 ppm |
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