D-Pyroglutamic acid4042-36-8

Product name :D-pyroglutamic acid CAS NO.:4042-36-8 Appearance: White crystals with lumps Specific rotation[?????20 (C=2 in H2O): +10.8???+12.3? Melting Point (??: 160 to 163 ?? Chloride(C1): Not more than 0.02% Iron(Fe): Not more than 10ppm Heavy metals(Pb): Not more than 10ppm Arsenic(As2O3): Not more than 1ppm Loss on drying: Not more than 0.20% Residue on ignition: Not more than 0.10% Assay: 98.0%??01.0%

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