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Status : Active
Standard Type : Main
Document No : ISO 4320 : 1977
Document Year : 1977
Pages : 3
Edition : 1
Section Volume : Surface active agents (ISO/TC 91.)
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.