ISO 6796:1981
ISO 6796:1981 Polyglycols for industrial use – Determination of hydroxyl number – Phthalic anhydride esterification method
CDN $82.00
Description
The hydroxy groups present in a test portion are esterified with phthalic anhydride. The excess phthalic anhydrids is hydrolyzed and the phthalic acid formed is neutralized with standard volumetric sodium hydroxide solution. If the sample contains free acidity or alkalinity a corresponding correction is made. From the corrected hydroxyl number, the apparat relative molecular mass may be calculated by a formula given.
Edition
1
Published Date
1981-09-01
Status
PUBLISHED
Pages
3
Language
English
Format
Secure PDF
Secure – PDF details
- Save your file locally or view it via a web viewer
- Viewing permissions are restricted exclusively to the purchaser
- Device limits - 3
- Printing – Enabled only to print (1) copy
See more about our Environmental Commitment
Abstract
The hydroxy groups present in a test portion are esterified with phthalic anhydride. The excess phthalic anhydrids is hydrolyzed and the phthalic acid formed is neutralized with standard volumetric sodium hydroxide solution. If the sample contains free acidity or alkalinity a corresponding correction is made. From the corrected hydroxyl number, the apparat relative molecular mass may be calculated by a formula given.
Previous Editions
Can’t find what you are looking for?
Please contact us at:
Related Documents
-
ISO 1388:1981 Ethanol for industrial use – Methods of test – Part 8: Determination of methanol content (methanol contents between 0,10 and 1,50 % (V/V)) – Visual colorimetric method
CDN $85.00 Add to cart -
ISO 17196:2014 Dimethyl ether (DME) for fuels – Determination of impurities – Gas chromatographic method
CDN $261.00 Add to cart -
ISO 17198:2014 Dimethyl ether (DME) for fuels – Determination of total sulfur, ultraviolet fluorescence method
CDN $193.00 Add to cart -
ISO 1388:1981 Ethanol for industrial use – Methods of test – Part 5: Determination of aldehydes content – Visual colorimetric method
CDN $85.00 Add to cart
