2,3',4,4',5',6-Hexachlorobiphenyl (168)

Glycerol, Stock solution, 500µg/mL, Solvent-dry pyridine, Unit 10mL, # of units-1, Cas.no. 56-81-5

Atrazine-d5 (ethyl-d5),1000 µg/mL,acetonitrile,1mL,

Formaldehyde-DNPH Level 4 (2ug/mL)