CAS 1707-03-5 appears in our catalog under these names: Diphenylphosphinic acid/ 99%, Diphenylphosphinic Acid, >95% (HPLC), Diphenylphosphinic acid, Diphenylphosphinic acid, 99% , Diphenylphosphinic Acid, >98.0%(HPLC)(T). Offered by: Chemat, TRC, GLPBio, Thermo Scientific (Alfa Aesar), TCI. Available pack sizes: 5g, 1g, 25g, 100g, 500g, 10g, 1000g, 1kg.