Metformin, 1000μg/ml in MeOH, 1ml

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)

1,2,11,12-Tetrachlorododecane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 210115-98-3

2,2',3,3',4-Pentachlorobiphenyl