CAS 1007541-72-1 appears in our catalog under these names: 3-Ethyl-1h-pyrazole-4-carboxylic acid, 95%, 5-Ethyl-1h-pyrazole-4-carboxylic acid, 95%, 5-Ethyl-1H-pyrazole-4-carboxylic acid, 98+%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 1g, 5g.