CAS 4830-05-1 appears in our catalog under these names: 3,3-Dimethyl-tetrahydro-pyran-2-one, 97%, 3,3-Dimethyltetrahydro-2H-pyran-2-one 95%, 3,3-Dimethyltetrahydro-2H-pyran-2-one, 95%, 95%, 3,3-Dimethyl-tetrahydro-pyran-2-one, 95%. Offered by: Combi-blocks, Ambeed, Chemat, Fluorochem. Available pack sizes: 250mg, 1g, 100mg, 5g.