2,3-Dichloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene

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)

Serotonin hydrochloride,neat,neat,25mg,

Chlorotoluron D6, 100µg/mL in Acetone, 1ml