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 71641 Propyl sulfide Price on request 59906 Cations Std. Level 1 Price on request 70074 2-Chloroethyl vinyl ether Price on request