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

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Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

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English, French

Published date

03-01-1980

Publisher

International Organization for Standardization

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.

Committee	ISO/TC 91
DevelopmentNote	Also numbered as BS 6829-4.6(1988) (09/2005)
DocumentType	Standard
Pages	3
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
UNE 55730:1982	Identical
NBN T 63 142 : 1980	Identical

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ISO 4326:1980

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

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