EPA Method 8141/1657 Surrogate Standard Back Catalog number: 92357 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 95353 Semi-Volatile Mix Price on request X9086 3,3’-Dimethylbenzidine Price on request 0997.46-10MG n-Hexatetracontane, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 7098-24-0 Price on request