Soap ingredients: sodium R-CO2Na, the synthesis of pigment, synthetic spices, preservatives, antioxidants, foaming agent, curing agent, viscosity agent, synthetic surfactants.
The main component of soap (R-CO2Na, sodium stearate (C17H35COONa)), which is different from the general R group, is a variety of alkyl. R- is a hydrophobic group, and the carboxyl group is hydrophilic. Soap in hard water and Ca2+, Mg2+ formed a curd like substance, fatty acid calcium salts, usually said that the "calcium soap" and become useless in detergents. To remove hard water softener ion can make soap in hard water, play a role