WS Disinfection By-Products - Cal Check 1

1,2-Dichlorotrifluoroethane

ß alpha alpha (20R)-Cholestane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 481-20-9

L-Ascorbic acid sodium, 100µg/ml in Acetonitrile,