一级外国黄色视频,免费淫秽视频黄片国产,亚洲一区二区三区黄片,高清国产一区二区在线观看,欧美一级高清黄色录像

Features and functions
High efficiency and low cost;
Stable under wide PH range;
Widely used in cosmetics and detergent, as, shampoo, amendment agent;
Compatible with almost all cosmetic materials;
Recommended dosage: .2%~0.6%;