通式 R =烷基的基团，优选硬化椰子脂肪酸或对应于平均的椰子脂肪酸的脂肪酸混合物，其具有的至少40重量％的固体含量的溶液.-％，pH值为5-8的甜菜碱的含水液体溶液 具有和（基于溶液）<= 1重量％，其特征在于为1的内容，以3重量％的氨基酰胺的一种或多种饱和的具有8至18个碳原子或一个或多个不饱和脂肪酸的平均脂肪酸 8至24个碳原子的平均和0至4重量甘油％（基于溶液）。

An aqueous liquid solution of a betaine of the general formula
R = alkyl group of preferably hardened coconut fatty acid or a fatty acid mixture, which corresponds to an average of coconut fatty acid, the solution having a solids content of at least 40 wt .-%, a pH of 5 to 8 and an aminoamide of ≦ 1 wt .-% , characterized by a content of 1 to 3 wt .-% (based on solution) of one or more saturated fatty acids with on average 8 to 18 carbon atoms or one or more unsaturated fatty acids with on average 8 to 24 carbon atoms and 0 to 4 wt % (based on solution) glycerol.