99.5% Pure Beta Arbutin Powder White Crystalline for Skin Whitening
Specifications:
|
Items |
Specification |
Results |
|
Appearance |
White crystalline powder |
Conform |
|
Assay (HPLC) |
99.5%min. |
99.9% |
|
Hydroquinone |
10ppm max. |
Conform |
|
Melting point(°C) |
199-201±0.5 |
199.7-200.6 |
|
Loss on drying (%) |
≤0.5% |
0.25% |
|
Clarity of water solution |
Transparency, colorless, none suspended matters |
Conform |
|
PH value of 1% aqueous solution |
5.0---7.0 |
6.21 |
|
Specific optional rotation |
αD20-66±2° |
-65.3 |
|
IPV |
1515cm-11220cm-11050cm-1 ±(58)cm-1 |
Conform |
|
Ignition residue |
≤0.5% |
Conform |
|
Heavy Metal |
10ppm max. |
Conform |
|
Arsenic |
2ppm max. |
Conform |
|
Pathogen |
Bacteria: ≤300cfu/g |
20 |
|
Fungus: ≤100cfu/g |
20 |
Quick Detail:
CAS No.: 497-76-7
Other Names: 4-Hydroquinone beta-D-glucopyranoside
Molecular Formula: C12H16O7
