Appearance: white crystalline powder
Specific rotation D20: -11.0°～-12.0°(C=5,H2O)
Chloride(Cl): 0.02% max
Ammonium(NH4): 0.02% max
Sulfate(SO4): 0.02% max
Heavy metals(Pb): 10ppm max
Iron(Fe): 10ppm max
Arsenic(As2O3): 1ppm max
Loss on drying: 0.50% max
Residue on ignition: 0.10% max
L-Pyroglutamic acid; H-Pyr-OH 98-79-3 is a building block for pharmaceuticals and asymmetric synthesis. It's an amino acid that is used in the synthesis of peptides. It has also been observed to convert when placed at the N-terminus in vivo to create IgG2 antibodies.
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