GB/T 7383-1997
Non-ionic surface active agents--Polyalkoxylated derivatives--Determination of hydroxyl value--Phthalic anhydride method (English Version)
- Standard No.
- GB/T 7383-1997
- Language
- Chinese, Available in English version
- Release Date
- 1997
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2008-02
- Replace By
- GB/T 7383-2007
- Latest
- GB/T 7383-2020
- Scope
- This standard specifies the method for determining the hydroxyl value of polyalkoxylated derivatives by esterifying hydroxyl groups with phthalic anhydride. This standard is applicable to the determination of the hydroxyl value of aliphatic and alicyclic polyalkoxylated derivatives (especially primary and secondary fatty alcohols, alkylphenols and fatty acid ethylene oxide, propylene oxide and their mixed adducts The determination of the hydroxyl value) can be used for the determination of the hydroxyl value of 10 to 1000.
GB/T 7383-1997 history
- 2020 GB/T 7383-2020 Non-ionic surface active agents—Determination of hydroxyl value
- 2007 GB/T 7383-2007 Non-ionic surface active agents.Determination of hydroxyl valu
- 1997 GB/T 7383-1997 Non-ionic surface active agents--Polyalkoxylated derivatives--Determination of hydroxyl value--Phthalic anhydride method
