Chemical coating agents for medical devices; flocculants; chemicals for use in the purification of water; chemicals for use in separation and purification techniques; chemicals for use in chromatography; biochemical catalysts; tensio-active chemical agents and surface-active chemical agents for formulating poorly water-soluble substances; solubilizing agent for aerosols; chitosan for use as a raw ingredient in the manufacture of cosmetics or pharmaceuticals; preservatives for use in the pharm...