CAS 21609-90-5 appears in our catalog under these names: Leptophos, LEPTOPHOS PESTANAL., Leptophos, ROTICHROM® Pestilyse® HPLC, 10 mg, glass, Leptophos, Concentration: 100 µg/ml Solvent: Ethyl acetate. Offered by: Dr. Ehrenstorfer, Sigma-Aldrich, Roth, HPC Standards. Available pack sizes: 100mg, 10mg, 1x100mg, 1x5ml.