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English Translations » 历史存档[信息] » Indicator for determining the acid value of dark-colored car

Indicator for determining the acid value of dark-colored carbon nine petroleum resin

2015-11-09View Original

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Dear experts, may I ask what is generally used as an indicator for the acid value of carbon-9 petroleum resin: bromothymol blue or phenolphthalein? What is the basis for the selection? ?
Reply #22015-11-09
To determine the acid value of petroleum resins, the methods for measuring the acid value of petroleum products should be referred to, generally the non-aqueous solvent titration method. In this method, there is a specified description for the indicator. I don’t remember it being phenolphthalein.
Reply #32017-03-15
Phenolphthalein is used as an indicator, and a KOH standard solution is used for titration.

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Translated at 2026-07-21 01:20:59

Original: https://bbs.hcbbs.com/thread-1493270-1-1.html

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