EPA Method 552.1 - Surrogate Standard Back Catalog number: 31056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0192.4-1ML 2-Methyl-1-propanethiol, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 513-44-0 Price on request 677202 4-sec-Butylphenol, 250mg Price on request 50235 Mix #2 Price on request