EPA Method 507 - Performance Check Solution

2-Carboxy-4-chlorophenoxyacetic acid, 10mg

Stigmasterol, 100µg/mL, Solvent-n-hexane, Unit 1mL, # of units-1, Cas.no. 83-48-7

2,2',4,4',5,5'-Hexabromobiphenyl, 1.2ml x 50ug/ml, nonane