EPA Method 500 Series Internal Standard

2-Methyldibenzothiophene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 20928-02-3

4-Chloro-2-methylaniline,100mg/mL,acetonitrile,1mL,

2,3',5,5'-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL,