EPA Method 502.2 Internal Standard

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

2,2',3,3',4,5,5',6,6'-Nonachlorobiphenyl

n-Hexylcyclohexane