Specification

Appearance                                             White crystalline powder

Assay                                                      ≥98%

Melting point                                           158~163℃

Clarity of water solution                           Transpency,colorless,nonesuspended matters

Specific optical rotation                            [α]D20=+186~188°

Free ascorbic acid                                    ≤0.1%

Free glucose                                            ≤0.1%

Heavy metal                                           ≤10ppm

Arsenic                                                   ≤2ppm

Loss on drying                                         ≤1.0%

Ignition residue                                       ≤0.5%

Pathogen                                                Bacteria:≤300cfu/g

                                                             Fungus:≤100cfu/g

1. Significantly reduces the production of melanin by inhibiting tyrosinase activity. This results in a reduction of Dopaquinone, an intermediate of melanin synthesis. Additionally it converts existing Dopaquinone to L-Dopa

2. Can significantly lighten existing black melanin by a reduction reaction

3. Can dramatically reduce the free radicals that result from UV irradiation of the skin, and significantly reduce cell damage

4. Promotes collagen synthesis of skin fibroblasts. Collagen is a protein that plays an important role in the structure and firmness of skin.