CAS 492-27-3 appears in our catalog under these names: Kynurenic Acid, >95% (HPLC), Kynurenic acid/ 99.69% (existing batch purity), Kynurenic acid, Kynurenic Acid, >98.0%(T)(HPLC), Kynurenic acid - Bio-X â„¢. Offered by: TRC, TargetMol, Biosynth, TCI, Ambeed. Available pack sizes: 100mg, 10mg, 500mg, 50mg, 5g, 1g, 10g, 250mg.