PROBLEM TO BE SOLVED: To provide a first agent for oxidation hair dye which has increased viscosity.SOLUTION: The creamy first agent for oxidation hair dye is obtained by blending: oxidation dye the ester of higher fatty acid and higher alcohol represented by the following formula (I) and an alkali agent. R1-COO-R2 (I) [in the formula (I), R1 denotes 12 to 22C linear alkene having a degree of unsaturation of 1 and R2 denotes 12 to 22C linear alkene having a degree of unsaturation of 1].COPYRIGHT: (C)2013,JPO&INPIT【課題】粘度が高められた酸化染毛剤用第1剤の提供。【解決手段】酸化染料、下記式(I)で表される高級脂肪酸と高級アルコールとのエステル、及びアルカリ剤が配合されたクリーム状の酸化染毛剤用第1剤。R1-COO-R2 (I)[上記式(I)において、R1は不飽和度が1である炭素数12以上22以下の直鎖状アルケンを表し、R2は不飽和度が1である炭素数12以上22以下の直鎖状アルケンを表す。]【選択図】なし
