Ethynylestradiol (20,21-13C2,99%) 100 µg/mL in Acetonitrile, 1,2ml Back Catalog number: CLM-3375-1.2 Availability: In the manufacturer's stock Price on request - + Recommended 92581 PAH Standard Price on request 93644 8260 IS & SS Price on request 2124.12-10-IO Arochlor 1016 , 10µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 12674-11-2 Price on request