ISO 4327-1979 标准详情
- 标准号:ISO 4327-1979
- 中文标题:非离子活性剂;聚乙氧基衍生物;羟值测定;邻苯二甲酸酐法
- 英文标题:non-ionic surface active agents; polyalkoxylated derivatives; determination of hydroxyl value; phthalic anhydride method
- 标准类别:国际标准化组织标准ISO
- 发布日期:1979-12-15
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 est
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