EPA Method 528 Internal Standard

D10-Chlorpyrifos, 100 µg/ml, Acetone, 1ml

2,4-Dichloro-3,5-dimethylphenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 133-53-9

24S-Methyl-5 alpha(H)-cholestan-3ß-ol, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no.