EPA Method 552.1 - Surrogate Standard Back Catalog number: 31056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2493.18-K-IO Di-n-heptyldiethyltin, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 165900-80-1 Price on request BRP-234 2,3,4-Tribromophenol, 1.2ml x 100ug/ml, toluene Price on request 56125 Manganese (Mn) Price on request