CAS 1666-03-1 appears in our catalog under these names: 2-Hydroxy-4,5-dimethylbenzaldehyde 95+%, 2-Hydroxy-4,5-dimethylbenzaldehyde, 95%+, 95%+, 2-Hydroxy-4,5-dimethyl-benzaldehyde, 95%+. Offered by: Ambeed, Chemat, Fluorochem. Available pack sizes: 100mg, 250mg, 1g, 5g.