BHC (epsilon isomer), 100ug/ml in Toluene, 1ml

Fluorescein (free acid),neat,neat,100mg,

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)

Nicotinamide, 250mg