It has abilities of skin-whitening, skin-caring and fleck-dispelling.
Specifications︰
Test items Specifications Appearance White needle crystal or powder Assay(HPLC) ≥99.5% Melting point 199∽201?.5°C Clarity of water solution Transparancy colorless,none suspended matters PH Value 5.0-7.0 Specific optical rotation [α]20D=-65.00?.00 Infrared characteristic peak value 1512cm-1 1219cm-1 1049cm-1 ?(5∽7)cm-1 Loss on drying ≤0.5% Heavy metal(ppm) ≤20 Arsenic(ppm) ≤2 Hydroquinone ≤20 Total Plate count ≤100CPU/g
