EPA Method 507 - Internal Standard

n-Butyl 4-hydroxybenzoate-butyl d9, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1216904-65-2

Cholesterol-d7, 2,5mg

Dimetridazole-2-hydroxy, 100 µg/ml, Methanol, 1m