Problem to be solved: to provide a bicell which is able to maintain a disk like structure in a dilution condition and an organism environment, and is easy to prepare, and is excellent in biocompatibility and skin permeation.SolutionIn the region of pH 6 to 8, there are more than 50 mass% of the phospholipids that are negatively charged in the whole molecule, and the cosmetics, carrier material, photonic material and NMR oriented agent containing the above described bicell.Diagram【課題】希釈条件や生体内環境でもディスク状の構造体を維持することができ、調製が容易で、生体適合性及び皮膚透過力に優れるバイセルを提供する。【解決手段】 pH6～8の領域において分子全体が負に帯電しているリン脂質を５０質量％以上含む、バイセル、並びに該バイセルを含む化粧料、キャリア材料、フォトニック材料及びＮＭＲ配向剤。【選択図】図２
