CAS 1003879-42-2 appears in our catalog under these names: Bis(2-ethylphenyl)phosphine oxide 97%, bis(2-Ethylphenyl)phosphine oxide, 97%, Bis(2-ethylphenyl)phosphine oxide, 97%, 97%. Offered by: Ambeed, Fluorochem, Chemat. Available pack sizes: 100mg, 250mg, 1g, 5g.