ISO 1389-4:1977 PDF
Phthalic anhydride for industrial use — Methods of test — Part 4: Measurement of colour after treatment with sulphuric acid
Open preview (PDF)Phthalic anhydride for industrial use — Methods of test — Part 4: Measurement of colour after treatment with sulphuric acidTitle (English):
ISO 1389-4:1977
Phthalic anhydride for industrial use — Methods of test — Part 4: Measurement of colour after treatment with sulphuric acid
- Document status:
- Withdrawn
- Format:
- Electronic (PDF)
- Number of pages:
- 2
- Publication date:
- February 1, 1977
- Edition:
- ISO IS 1389 edition 1 version 1
- ICS:
- 71.080.50
Description (English):
The test sample is treated with sulphuric acid solution in a conical flask in boiling water bath for 3 h. The colour is measured by the method specified in ISO 2211. The results are expressed in Hazen units. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.
Technical details
- Technical committee
- ISO/TC 47 - Chemistry
- SKU
- ISO 1389-4:1977
