EPA Method 8260B Mix #5 Back Catalog number: 82445 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2903.20-10MG 17ß-Ethynylestradiol, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 4717-38-8 Price on request 50292 Anions Mix Price on request 91625 Surrogate Standard Price on request