CAS 400756-39-0 appears in our catalog under these names: 4-Chloro-1-ethyl-1h-pyrazole-5-carboxylic acid, 95%, 4-Chloro-1-ethyl-1H-pyrazole-5-carboxylic acid, 95+%, 4-Chloro-1-ethyl-1H-pyrazole-5-carboxylic acid. Offered by: Combi-blocks, AmBeed, Fluorochem. Available pack sizes: 1g, 5g.