ISO 4311:1979
ISO 4312:1989-ed.2.0..
ISO 4313:1976
ISO 4314:1977
ISO 4315:1977
ISO 4316:1977
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ISO 4327:1979
Non-ionic surface active agents — Polyalkoxylated derivatives — Determination of hydroxyl value — Phthalic anhydride method
Automatically translated name:
Non-ionic surface active agents -- Polyalkoxylated derivatives -- Determination of hydroxyl value -- Phthalic anhydride method
STANDARD published on 1.12.1979
The information about the standard:
Designation standards: ISO 4327:1979
Publication date standards: 1.12.1979
SKU: NS-432138
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: International technical standard
Category: Technical standards ISO
The category - similar standards:
Annotation of standard text ISO 4327:1979 :
Description / Abstract: The hydroxyl groups are esterified by phthalic anhydride in pyridine solution. The excess of phthalic anhydride is hydrolyzed with water containing in the sodium hydroxide solution used for the neutralization. The acidity which appears during the esterification and of the phthalic acid formed during the hydrolysis is neutralized by sodium hydroxide solution in the presence of phenolphthalein as indicator. The hydroxyl value is calculated from the difference between the volumes of sodium hydroxide solution used for the titration of the blank and of the test solution.
Similar standards:
1.6.1979
17.8.1989
1.11.1976
1.2.1977
1.2.1977
1.8.1977
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