EPA Method 552.1 - Surrogate Standard Back Catalog number: 31056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3542.32-5UG (22RS)-30-Bishomohop-17(21)-ene, neat, Solvent-neat, Unit ca. 5µg, # of units-1, Cas.no. Price on request 98453 Organophosporus Pesticides Price on request 58060 Neodymium (Nd) Price on request