Custom PBDE-mix III 7 components Brx3-Brx10, each 100µg/mL in isooctane 1961.12-50-IO 2,4,4'-Tribromodiphenyl ether PBDE-28 1962.12-5MG 2,2',4,4'-Tetrabromodiphenyl ether PBDE-47 1967.12-5MG 2,2',4,4',5-Pentabromodiphenyl ether PBDE-99 1968.12-5MG 2