Freon Standard Back Catalog number: 95157 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2874.11-50-ME Perfluoroundecanoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 2050-94-8 Price on request 92789 EPA Method 8081A Pesticide Standard A Price on request 91931 2-Chloropyridine Price on request