Natural arbutin (Natural arbutin)

Natural Arbutin
Appearance:White crystalline powder,
Loss on drying:0.5%,
Clarity of water solution:Transpency,colorless,none suspended matters,
Melting point:199~201?.5 centigrade
Assay:99.5%min.
Ph value of 1% aqueous solution:5.0 to 7.0,
Specific optical ratation:-66? centigrade