Appearance | White to slightly yellow crystals,Usually needlelike |
Odour | A sweet aroma,milk aroma and vanilla aroma |
Melting Range/ºC | 81.0-83.0 |
Content/% | ≥99.5 |
Loss On Drying/% | ≤0.5 |
Content of As % | ≤0.0003 |
Heavy metal/% | ≤0.001 |
Residue on ignition/% | ≤0.05 |