PAH Standard (20 ppm) Back Catalog number: 98653 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2715.9-50-ME Perfluorononanoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 375-95-1 Price on request 3434.12-100-CY MCPB-methyl ester Price on request 73431 4-Amino-2-chlorophenol Price on request