CAS 1070-34-4 appears in our catalog under these names: 4-Ethoxy-4-oxobutanoic acid, 95%, mono–Ethyl succinate, Ethyl hydrogen succinate, 95% , Monoethyl succinate, mono-Ethyl succinate, 95%. Offered by: Fluorochem, GLPBio, Thermo Scientific (Alfa Aesar), Biosynth, Thermo Scientific (Acros). Available pack sizes: 5g, 10g, 25g, 100g, 500g, 1g, 50g, 250g.