Quality Standard:
Item | Specification |
Appearance | White crystalline powder |
Assay | ≥ 99.5 % |
Water solubility (100g/L) | Colorless to yellowish transparent liquid |
Maximum single impurity | ≤ 0.05 |
Melting point | 111.0~116.0℃ |
Residue on ignition | ≤ 0.5% |
Loss on drying | ≤ 1.0% |
pH (3%W/V) | 3.0-5.5 |
Arsenic | ≤ 1 ppm |
Heavy metal | ≤ 5 ppm |
Application: Whitening, sunscreen and anti-aging products