EPA Method 8032 Internal Standard

2-hydroxy-3-methylpentanoic acid, >95%, 50mg

4-n-Nonylphenol (ring13C6) (same as S-4376-1-5AC), 1µg/ml, Solvent-Acetone, Unit 4.5ml, # of units-1, Cas.no.

Water - Reagent Grade ASTM Type I