PCB No. 31, certified, 25mg

a-1,2,3,4,5,6-Hexachlorocyclohexane, 1.2mL x 100ug/mL, nonane

Sulfur Calibration Standard Unit: 10mL screw cap bottle or custom-made cylinders Chiron No. Matrix: Methanol Compound Concentration S-4078 0185.2 Dimethyl sulfide 5 ppm (w/w)

Astragaloside IV, >98%, 20mg