CAS 4021-13-0 appears in our catalog under these names: 4-Ethylpyridine-2-carboxylic acid, 4-Ethyl-2-pyridinecarboxylic acid, 95%, 95%, 4-Ethylpicolinic acid, 95%. Offered by: Biosynth, Chemat, Fluorochem. Available pack sizes: 2,5g, 100mg, 250mg, 1g.