CAS 70-49-5 appears in our catalog under these names: Thiomalic acid, Mercaptosuccinic acid, Mercaptosuccinic acid, 98% , Mercaptosuccinic acid, 97.00%, DL-Mercaptosuccinic acid, 99%. Offered by: TRC, GLPBio, Thermo Scientific (Alfa Aesar), Chemat, Thermo Scientific (Acros). Available pack sizes: 10g, 1g, 5g, 100g, 25g, 500g, 250g, 2.5KG.