ISO 1897-4:1977
Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use; Methods of test; Part IV : Visual test for impurities insoluble in sodium hydroxide solution (Excluding cresylic acid and xylenols)
- Standard No.
- ISO 1897-4:1977
- Release Date
- 1977
- Published By
- International Organization for Standardization (ISO)
- Status
- 2002-05
- Latest
- ISO 1897-4:1977
- Scope
- Simple empirical test of no great precision. The principle consists in shaking a test portion with sodium hydroxide solution under specified conditions and assessment of any insoluble matter present in suspension in the mixture by comparison either with an agreed standard turbidimetric solution or with sodium hydroxide solution. The comparison of the turbidity of the two solutions is carried out by viewing vertically and with the electric lamp equipped with a ligth blue dayligth-bulb switched on.
ISO 1897-4:1977 history
- 1977 ISO 1897-4:1977 Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use; Methods of test; Part IV : Visual test for impurities insoluble in sodium hydroxide solution (Excluding cresylic acid and xylenols)
