Sulfamethazine,neat,neat,250mg,

5-Methyl-2-nitroanisole, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 38512-82-2

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

4-Amino-2´,3-dimethylazobenzene, certified, 0.25g