Laboratory Fortification Standard Back Catalog number: 59172 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 672814 Atrazine, 250mg Price on request 681209 Halauxifen (free acid), 25mg Price on request 0005.21-200-T 3-Methylcholanthrene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 56-49-5 Price on request