2,4,4’-Tribromodiphenyl ether, 50µg/ml in IO, 1ml

2,2',3,4,4',5,5'-Heptachloro[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane

1,3-Dinitrobenzene

Methyltin mercaptide (technical mixture), 100mg