英文名称:D-Pyroglutamic acid CAS号：4042-36-8

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氨基酸原料

Item Standard Analysis data Appearance White crystals Conforms Specific rotation[α]D/20 (C=2  in H2O) +10.8°to +12.3° +11.65° Melting Point (ºC) 159 to 161 ºC 160ºC Chloride(C1) Not more than 0.02% 0.005% Sulfate(SO4) Not more than 0.02% 0.005% Iron(Fe) Not more than 10ppm 8ppm Heavy metals(Pb) Not more than 10ppm <10ppm Arsenic(As2O3) Not more than 1ppm <1ppm Loss on drying Not more than 0.50% 0.25% Residue on ignition Not more than 0.10% 0.08% Assay 98.0%～101.0% 99% Conclusion The product conforms to the standard,  the method of test consult AJI92