ι-Carrageenin is a polysaccharide obtained from red algae. ι-Carrageenin has been used as a bioadhesive polymer to enhance the permeation effect of AT1002 on the nasal absortion of insulin.||Molecular Formula:|[C14H22O15S22-]x||Molecular Weight:|-494.45||Storage and Stability:|Store at -20°C. For maximum recovery of product, centrifuge the original vial prior to removing the cap.