alpha arbutin cas 84380-01-8

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alpha arbutin cas 84380-01-8
Item Specification Results
Appearance White crystalline powder
Assay : 99.90%
Melting point 2: 204.6-205.8
Clarity of water solution Transpency, colorless, none suspended matters Pass
pH value of 1% aqueous solution: 6.05
Specific optical ratation D20= + 176~ 184degree + 179.5
Hydroquinone 10 ppm max pass
Heavy metal 10 ppm max pass
Loss on drying 0.5% max 0.05%
Ignition residue 0.5% max 0.04%
Pathogen Bacteria: 300cfu/ g max
Fungus: 100cfu/ g max 20 20

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