PROBLEM TO BE SOLVED: To provide a gellant having excellent gelling ability with respect to an organic group agent such as an alcohol, and a gel composition containing the same.SOLUTION: The gellant contains a cellulose derivative having a 100,000-1,500,000 mass average molecular weight represented by formula (1), wherein R is a group selected from the group consisting of a hydrogen atom, a hydroxyalkyl group and a substituent represented by general formula (2), Q, E1 and E2 are each a specific alkane diyl group, A is an ether bond or an oxycarbonyl group, a is a number from 0 to 10, n is a number from 0 to 20, and the substitution degree of the substituent of formula (2) is 50-200 per 1,000 repeating units of formula (1).COPYRIGHT: (C)2009,JPO&INPIT【課題】アルコールなどの有機基剤に対し、優れたゲル化能を有するゲル化剤、及びそれを含むゲル状組成物の提供。【解決手段】下記式(1)で表される質量平均分子量10万~150万のセルロース誘導体を含むゲル化剤。(式中、Rは、水素原子、ヒドロキシアルキル基、及び一般式(2)で表される置換基から選ばれる基を示し、Q、E1、E2は特定のアルカンジイル基を示し、Aはエーテル結合又はオキシカルボニル基を示し、aは0~10、nは0~20の数であり、式(2)の置換基の置換度は、式(1)の繰り返し単位1000個当たり50~200である。)【選択図】なし
