CAS 28874-51-3 appears in our catalog under these names: L-Pyroglutamic acid sodium, 97%, Sodium L-Pyroglutamate (Technical Grade), Sodium L–pyroglutamate, Sodium pyroglutamate, L-Pyroglutamic acid sodium 50% in H2O. Offered by: AmBeed, TRC, GLPBio, Biosynth, Chemat. Available pack sizes: 500g, 25g, 1g, 500mg, 5g, 2kg, 1kg, 5kg.