ISO 1897-9:1977
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use Methods of test Part 9: Determination of m-cresol content (Cresylic acid only)
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
18-03-2019
English, French
01-04-1977
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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.
| DevelopmentNote |
Supersedes ISO 1911 (04/2001)
|
| DocumentType |
Standard
|
| Pages |
4
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Supersedes |
| Standards | Relationship |
| NBN T 04 284 : 1985 | Identical |
| BS 521:1964 | Similar to |
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