不是防腐劑

Behentrimonium Methosulfate
山崳基三甲基硫酸甲酯銨
一種從蔬菜中提取的，具有自我乳化功能的植物蠟，能有效改善發絲糾結、調理髮質，增加濕度，乾燥發絲纖維，讓您的頭髮如絲般柔滑。

This isn't a preservative. It's an emulsifying agent with smoothing properties and is frequently used in hair conditioner/detanglers. When used on the skin, it gives a soft and powdery after-touch.