EPA Method 500 Series Internal Std #4

4-Iodo-2-methylphenol, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 60577-30-2

EPA Method 502/524 VOC Mix #4

2,2’,3,5’-Tetrachlorobiphenyl (44)