Caffeine, neat, Solvent-neat, Unit 500mg, # of units-1, Cas.no. 58-08-2

Heptachlor, 100 µg/ml, Ethyl acetate, 1ml

17ß-Estradiol-2,4,16,16-d4, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 66789-03-5

2,2',3,4',5,5',6-Heptachloro-4-[13C12]biphenylol, 1.2ml x 50ug/ml, toluene