Norm

ISO 4326:1980 en

Non-ionic surface active agents - Polyethoxylated derivatives - Determination of hydroxyl value Acetic anhydride method

31,57

Over deze norm

Status Definitief
Aantal pagina's 3
Gepubliceerd op 01-03-1980
Taal Engels
The hydroxyl group is esterified by acetic anhydride in pyridine solution. The excess of acetic anhydride is hydrolized with water. The acidity which appears during the esterification and the acetic acid formed during the hydrolysis are neutralized by sodium hydroxide solution in the presence of phenolphthalein as indicator. The hydroxyl value is calculated from the difference between the volume od sodium hydroxide solution used for the titration of the blank and of the test solution.

Details

ICS-code 71.100.40
Nederlandse titel Non-ionic surface active agents - Polyethoxylated derivatives - Determination of hydroxyl value Acetic anhydride method
Engelse titel Non-ionic surface active agents - Polyethoxylated derivatives - Determination of hydroxyl value Acetic anhydride method

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