Methyl Derivatives of Herbicides Back Catalog number: 81511 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2834.5-50-ME 5H-Perfluoropentanoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 376-72-7 Price on request 20003 EPA Method 8240A/1666 - Purgeable Internal Std Price on request 0768.16-500-IO 3,6-Dimethylphenanthrene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 1576-67-6 Price on request