EN ISO 4320:1997

Non-ionic surface active agents - Determination of cloud point index - Volumetric method (ISO 4320:1977, Including Erratum:1980) EN ISO 4320:1997

Publication date:   Jan 1, 1998

Scope

The determination is carried out by adding, at 30 degree Celsius, of distilled water to a propanol solution to the surface active agent until the appearance of cloudiness. The determination of the cloud point index provided a way of characterizing weakly alkoxylated derivates and their hydrocarbon hydrophobic groups. This simple and rapid measurement is a valuable means for checking the level of alkoxylation of non-ionic derivatives intended, for example, for sulphonation.