Synonyms: 5-Hydroxy-1H-indole-2-carboxylic acid Purity Limit: ≥ 97% (HPLC) CAS No.: 21598-06-1 Molecular Formula: C9H7NO3 Molecular Weight: 177.16 MDL No.: MFCD00005615 Appearance: White to yellow crystalline powder Storage Temperature: Store at 0-8°C