CAS 2124-55-2 appears in our catalog under these names: Indole–4–carboxylic Acid, Indole-4-carboxylic acid, Indole-4-carboxylic Acid, >98.0%(GC)(T), Indole-4-carboxylic acid 98%, INDOLE-4-CARBOXYLIC ACID, 99%. Offered by: GLPBio, Biosynth, TCI, Ambeed, Sigma-Aldrich. Available pack sizes: 100g, 25g, 5g, 50g, 1g, 10g, 500MG, 500g.