ISO 1897-9:1977
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ISO 1897-9:1977
6583

Abstract 

The method is applicable to a product containing 35 % (m/m) to 60 % (m/m) of m-cresol, not more than 5 % (m/m) of phenol, and not more than 35 % (m/m) of o-cresol. The principle is based on dehydration of a quantity of the test sample. Formation of a complex between m-cresol and urea by addition of excess urea to a test portion of the dehydrated sample. Determination of the crystallizing point of the complex in a crystallizing point apparatus. Calculation of the content from the water content of the test sample and the crystallizing point of the complex. The relation between crystallizing point and m-cresol content of m-cresol/urea mixtures is given in a table. ISO 1897/9 replaces ISO Recommendation R 1911-1971.


General information 

  •  :  Withdrawn
     : 1977-04
  •  : 1
     : 4
  •  : ISO/TC 47 Chemistry
  •  :
    71.080.40 Organic acids

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