EPA Method 502/524 Surrogate Standard #2 Back Catalog number: 19267 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended P-089S Metribuzin, 100 µg/mL in MeOH, 1ml Price on request 675150 Beflubutamid, 100 µg/ml, Acetonitrile, 5ml Price on request 54254 Silica (SiO2) Price on request