中文名字：L-焦谷氨酸

Product Name: L-Pyroglutamic Acid
Synonyms:(S)-(−)-2-Pyrrolidone-5-carboxylic acid
Molecular Formula:C₅H₇NO₃
CAS #:98-79-3

Test Items	Standard
Appearance	White fine crystals
Assay	98.0 to 101.0%
Specific Rotation [α]20/D	−10.5?? c = 5% in water
Melting point	155-158 癈
Chloride (Cl)	Not more than 0.10%
Heavy Metals (Pb)	Not more than 10 PPM
Loss on Drying	Not more than 0.20%
Residue on Ignition (Sulfate)	Not more than 0.20%