Levonorgestrel, 100µg/mL in Acetonitrile, 1ml Back Catalog number: A14629760AL-100 Availability: In the manufacturer's stock Price on request - + Recommended 673593 Fenthion, 10 µg/ml, Ethyl acetate, 10ml Price on request 30097 EPA Method 509 Internal Standard Price on request 71086 2,3-Butanediol Price on request