EPA Method 500 Series Internal Std #4 Back Catalog number: 30003 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1419.9-250MG 3-Isopropylphenol, neat, Solvent-neat, Unit 250mg, # of units-1, Cas.no. 618-45-1 Price on request 94190 Freon 113 & MTBE Price on request NIST-1947 Lake Michigan fish tissue -Org. contaminants, 5x8g Price on request