EPA Method 551 Analytes

Triethylene glycol mono(p-nonylphenyl) ether isomer mix, 1000µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no.

Disulfoton-sulfoxide, 10µg/mL in Cyclohexane, 10ml

4,4'-Diaminobiphenyl,1000 µg/mL,acetonitrile,1mL,