EPA Method 8141 Surrogate Standard Back Catalog number: 92387 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2313.15-100 Chloroxuron, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 1982-47-4 Price on request 673122 Cholecalciferol, 100mg Price on request 0329.16-10MG Pyrene-d10, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 1718-52-1 Price on request