15N3-Atrazine, 100 µg/ml, Acetonitrile, 1ml

Heptachlor-exo-epoxide (cis-), 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 28044-83-9

USEPA 521MRL QC Standard - Nitrosoamine Mix

Ibuprofen, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 15687-27-1