Potassium (K)

1,2,3,4-Tetrachloro[13C12]dibenzo-p-dioxin , 1.2ml x 50ug/ml, toluene

5-Methyl-furfural, 100µg/mL, Solvent-, Unit 1mL, # of units-1, Cas.no. 620-02-0

2,2',3,3',4,5,6,6'-Octachloro-4'-methoxybiphenyl, 1.2ml x 50ug/ml, nonane