2,3,3',4,4',5,5'-Heptachlorobiphenyl (189)

2,4-Dimethyl acetic acid methyl ester, 100µg/mL, Solvent-MTBE, Unit 1mL, # of units-1, Cas.no. 55954-23-9

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Light White Oil (less than 20mg/kg S) Unit : 10mL screw-capped bottle Light White Mineral Oil Heavy White Mineral Oil (20 cSt at 40°C) (70 cSt at 40°C)

Phosphonic acid, 250mg