EPA Method 507 - Internal Standard Back Catalog number: 19031 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 98446 Aflatoxin G1 (from Aspergillus flavus) Price on request 92710 Acetophenone & Benzophenone Price on request 1264.7-1ML Toluene, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 108-88-3 Price on request