EPA Method 500 Series Internal Standard #5 Back Catalog number: 30004 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 3071.11-100-IO 5-Methyl-1-naphthol, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 51149-87-2 Price on request 95574 CLP SOM 01.1DMC Volatiles Liquids Price on request 1264.7-30K-IOX5 Toluene, 3 Wt% in Isooctane, 30mg/mL, Solvent-isooctane, Unit 1mL, # of units-5, Cas.no. 108-88-3 Price on request