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Search Home >> Standards Wordwide >> International Organization for Standardization (ISO) >> ISO 4326-1980 Non-ionic surface active agents; Polyethoxylated derivatives; Determination of hydroxyl value; Acetic anhydride method

ISO 4326-1980 Non-ionic surface active agents; Polyethoxylated derivatives; Determination of hydroxyl value; Acetic anhydride method

Standard Number:  ISO 4326-1980
Title:  Non-ionic surface active agents; Polyethoxylated derivatives; Determination of hydroxyl value; Acetic anhydride method
Language:  English
Publication Date:  1980/3/1
Execute Date:  1980/1/1
Status:  Current
International Classification for Standards (ICS)CHEMICAL TECHNOLOGY>>Products of the chemical industry>>Surface active agents
Publisher:  International Organization for Standardization (ISO)
Price:  
Number of Pages:3P.;A4   

Description: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.  
File Format:  PDF(Acrobat Reader) or Word version doc Document
File Size:  513KB
Tile in English:  Non-ionic surface active agents; Polyethoxylated derivatives; Determination of hydroxyl value; Acetic anhydride method

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