EPA Method 500 Series Internal Std #4 Back Catalog number: 30003 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended L12451000ME 2,4-Dichlorophenol, 10µg/mL in MeOH, 10ml Price on request 675025 2-Isopropyl-6-methyl-4-pyrimidinol, 250mg Price on request 95014 8260 Surrogate/Internal Standard Price on request