1-(2,6-Dichlorophenyl)-3-methylurea

Caffeine, 250mg

1,1,2-Trichlorotrifluoroethane

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)