Product name L-Pyroglutamic acid CAS number 98-79-3 Assay  ≥99% Appearance White fine crystal Application Used in food, medicine, cosmetics and other industries More information Synonyms: 5-Oxoproline,5-Oxopyrrolidine-2-carboxylic acid ,L-5-Pyrrolidone-2-carboxylic acid, (S)-(-)-2-Pyrrolidone-5-carboxylic acid Molecular Formula; C5H7NO3 Molecular Weight: 129.11 CAS Registry Number: 98-79-3 EINECS: 202-700-3 Melting point: 152-162 ºC