CAS 33142-21-1 appears in our catalog under these names: Ethyl 2-chloro-3-oxopropanoate, 95%, Ethyl 2-Chloro-2-formylacetateTechnical Grade, 5% Suspension in Benzene, Ethyl 2-Chloro-2-formylacetateTechnical Grade, 5% Suspension in Cyclohexane, Ethyl 2–Chloro–3–oxopropanoate, Ethyl 2-chloro-3-oxopropanoate, 90%. Offered by: Combi-blocks, TRC, GLPBio, Fluorochem, Ambeed. Available pack sizes: 1g, 10g, 5g, 25g, 100g, 500mg, 250mg, 50g.