CAS 686-69-1 appears in our catalog under these names: Chloro(diethyl)phosphine , Chloro(diethyl)phosphine, 95%, CHLORODIETHYLPHOSPHINE, 90%, TECHNICAL &. Offered by: Thermo Scientific (Alfa Aesar), Thermo Scientific (Acros), Sigma-Aldrich. Available pack sizes: 5g, 1g.