Difethialone, 10 µg/mL in Acetonitrile, 10mL

2-Chloropropene,neat,neat,250mg,

4-Methoxy-2',3',4',5'-tetrachlorobiphenyl, 100µg/ml in IO, 1ml

Hexavalent Chromium (Cr+6), 10mg/mL in H2O, 500ml