Chromium (Cr)

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

tert.-Butyl-ethylether, 1000µg/ml in MeOH, 5ml

2,2',3,3',4,4',6,6'-Octabromodiphenyl ether, 1.2ml x 50ug/ml, toluene