MES is a kind of new surfactant is renewable, good environment compatibility, biodegradability, and resistance to hard water, good detergency and low irritation etc excellent performance. LABSA can be combined with  the calcium, magnesium ions in the water, and formed in the water of the complex, so that LABSA lost washing efficiency. Due to the MES anti hard water performance is better than the traditional detergent raw materials of Labsa (Linear alkylbenzene sulfonate), so will become a ideal surface active agent for non phosphorus washing powder.