AOS has excellent wetting property, detergency, foaming ability and stability, and emulsifying powder. ITEMSTANDARDAppearanceWhite or Light Yellow PowderOdorNo Stronge OdorsActive Matter, %97+-2Unsulfate Matter,%3.0 MaxInorganic Salt (as Na2SO4),%5.0 MaxFree Alkali (as NaOH), %1.0 MaxColor (Klett, 5%, Am.aq.sol.)90 MaxAOS also has excellent calcium soap dispersibility, hard water resisitency and ...