trans-Aconitic acid

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

2,4-Dichlorobiphenyl (BZ-8)

ASTM D 5623 Sulfur Compounds Standard III, Dimethylbenzothiophenes 5 Analytes each approximately 500µg/mL each in isooctane; unit: 1x1mL 0952.10 2,3-Dimethylbenzothiophene 0953.10 2,4-Dimethylbenzothiophene 0954.10 2,5-Dimethylbenzothiophene 0