Also available in 1 mL, 2 mg, 5 mg, 10 mg, 50 mg, 100 mg and bulk. Please contact Fisher for quotes. Ciraparantag acetate, an anticoagulant reversal agent, is a small molecule specifically designed to bind noncovalently by charge-charge interaction to unfractionated heparin and low-molecular-weight heparin.It shows binding characteristics that are similar to those of direct oral anticoagulants (DOACs). Purity 99.65%