This European Standard specifies a method of assessing the stability in hard water of surface active agents which are readily soluble at ambient temperature or slightly higher temperatures. This method is applicable to surface active agents soluble in water at 20 ℃. It can be extended to those which are soluble at approximately 50 ℃.
BS EN 12458:1999 history
0000 BS EN 12458:1999(2009)
1999BS EN 12458:1999 Surface active agents - Determination of stability in hard water