EPA Method 550 Analytes

2-Hydroxy-2',3',5,5',6'-pentachlorobiphenyl, 10mg

n-Propyl 4-hydroxybenzoate-propyl d7, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1246820-92-7

Propachlor ESA sodium salt, 10mg