EPA Method 525 - Perchlorinates

n-Tridecane-d28, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-10, Cas.no. 121578-12-9

Isopropalin, 10 µg/ml, Ethyl acetate, 10ml

3,3’-Dimethylbenzidine