CLP Calibration Std. IV

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Heavy 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)

delta-HCH, certified, 50mg

N,N'-Diphenyl-1,4-phenylenediamine, 250mg