Chemical Name

L-Pyroglutamic Acid

Molecular Structure

Molecular Formula

C₅H₇NO₃

Molecular Weight

129.11

Characteristics

White crystals or crystalline powder

Packing

25㎏/drum，25㎏/carton

Quality  Standard

AJI92/USP28/EP5/FCCIV

Specification

Specific Rotation [a]D20^o

-10.5° —-12.3°

Sulfte(SO4)

≤0.02%

Heavy metal(PB)

≤10ppm

Iron(FE)

≤10ppm

Loss on Drying

≤0.5%

Arsenic(AS2O3)(Sulfated)

≤1ppm

Assay

98.5% —101.0%

Residue on ignition

≤0.1%

Other amino acid

Chromatographically not detectable

Chloride

≤0.2%