D-Pyroglutamic acid

Product Name: H-D-Pyr-OH CAS#: 4042-36-8 Synonyms: D-Pyroglutamic acid Molecular Formula: C5H7NO3 Molecular Weight: 129 Appearance:White crystals with lumps Specific rotation[α]D/20(C=2 in H2O):+10.8°to +12.3° Melting Point (oC):160 to 163 oC Chloride(C1): 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%～101.0%

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