EPA Method 508 Surrogate Standard Back Catalog number: 19042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2117.16-K-IO Diphenyldiethyltin, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 10203-52-8 Price on request 33071 o-Cresol Price on request 11388.14-10MG (±)-Naproxen-d3 (?-methyl-d3),neat,neat,10mg, Price on request