L-Pyroglutamic acid 98-79-3

Appearance

White crystalline powder



Specific rotation(a)D20



(C=5 H2O)

-11.0 to -12.0º



Chloride(C1)

Not more than 0.02%



Ammonium(NH4)

Not more than 0.02%



Sulfate(SO4)

Not more than 0.02%



Heavy metals(Pb)

Not more than 10ppm



Iron(Fe)

Not more than 10ppm



Arsenic(As2O3)

Not more than 1 PPM



Loss on drying

Not more than 0.5%



Residue on ignition

Not more than 0.1%



Assay

99.0-101.0%

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