WS Disinfection By-Products - Cal Check 1

Carvedilol-d4 (ethyl-d4), 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1133705-56-2

EPA Method 500 Series Internal Std #4

1-Octacosanol, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 557-61-9