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 30115 EPA Method 551.1 Performance Check Sol’n Price on request 12172.2-2K-ME Acetonitrile-1,2-13C2,2000 µg/mL,MeOH,1mL, Price on request 10367.19-5MG Paroxetine-d6maleate Price on request