Endosulfan sulphate

4-Ethylphenol, 500mg

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)

2,4,6-Tribromo[13C6]phenol, 1.2ml x 100ug/ml, toluene