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 79220 Diethylene glycol Price on request 59643 NIOSH 7903 - Inorganic Acid Scan Price on request 673457 Thiodicarb, 100 µg/ml, Acetonitrile, 5ml Price on request