Metformin-d6-HCl, 100µg/ml in Acetonitrile, 1ml

2,4-DB methyl ester, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 18625-12-2

Atrazine-d5 (ethyl-d5),100 µg/mL,acetonitrile,1mL,

Tetrachloroguaiacol , 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 2539-17-5