EPA Method 500 Series Internal Standard Back Catalog number: 31004 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3991.9-K-CY cis-1,3,trans-1,5-1,3,5-Trimethylcyclohexane, 1000µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 1795-26-2 Price on request 50005 1-Chlorooctadecane Price on request 79211 Ethion Price on request