乙酰色氨酸 企业标准

Appearancecrystals or crystalline powderSpecific rotation[α]20/D

(C=1 in NaOH)+25.8° to +27.0°Ammonium (NH4)Not more than 0.02%Sulfate (SO4)Not more than 0.020%Heavy metal(Pb)Not more than 10ppmLoss on drying Not more than 0.50%Residue on ignition(sulfated)Not more than 0.20%Assay98.5 to101.0%pH2.0 to 3.5