WS PAH Calibration Level 4 Back Catalog number: 92605 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79425 2,4-D methyl ester Price on request 66066 2,3’,4,4’-Tetrachlorobiphenyl (66) Price on request 0464.16-200-T 1,3-Dimethylanthracene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 610-46-8 Price on request