Internal Standard Back Catalog number: 90396 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50699A IC Standard 1A Price on request 31083 EPA Method 507/525 Analytes Mix #2 Rev.1 Price on request 1313.10-100-IOX5 1-Fluoronaphthalene, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-5, Cas.no. 321-38-0 Price on request