Acetic acid, certified, 5ml

1,2,3,4,6-Pentachloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene

Ammonia as N

2,2',3,4,4',5',6-Heptabromo[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane