Manali Petrochemicals Limited
Question
Asked 27th Sep, 2016
Which organic solvent can solve KOH ?
I want to solve KOH in an organic solvent .Afterwars, I want to react it with the chloromethylated polysulfone in order to substitute the chloride group by the hydroxide group. So please I want a solvent that can solve them both ( a common solvent ) and what are the reaction conditions
Most recent answer
The KOH not dissolved in DMF. But the color changed into yellow. Further adding KOH it turns dark yellow color. Is anyone tried to dissolve KOH in DMSO.
All Answers (14)
John Innes Centre
KOH disolves readily in methanol partially in ethanol so you can try using this as your solvent conditions or use something like a mix of methanol/chloroform or DMF (DMF should solubilize KOH) if your substrate wont disolve in the methanol alone
hope this helps
jordan
Bhabha Atomic Research Centre
You may try Dimethylsulfoxide (DMSO) a known polar solvent that dissolves most organics and inorganic salts. It is also miscible with water in all proportions. CH3S(O)CH3; MW 78.089, density 1.096 g/mL, mp 19°C, bp 189°C hope this will be useful for you to optimize your reaction conditions
vimalnath
2 Recommendations
Beijing University of Technology
thanks for you answers
It dissolves effectively the KOH salt. However when I dissolve the chloromethylated polysulfone ( CMPsf ) in alcholos it didnt work , this why i asked about a common solvent to solve them both
Dr. Marcus Binner | Unternehmer ∙ Begleiten
Hi Issam,
if you have problems with getting the right solvent composition for your reaction, you may try phase transfer catalysis. I'm not deeply in that topic, but I know that there are substances which are able to perform with regards to your specific needs.
Alternatively, why not try ionic liquids? They probably dissolve both KOH and you sample compound. At least, there were some solutions available on Sigma-Aldrich with OH- as counterion so it should be possible (see link).
Hope it helps,
Marcus
Universität Heidelberg
Dear Michael Ben,
Ethanol will be a suitable solvent to dissolve the KOH.
Regards,
Universidade NOVA de Lisboa
Potassium hydroxide is soluble in ethanol, phenol, and glycerol; and their aq. solutions. Insoluble in diethyl ether. Solubility data for KOH in ethanol aq. sol. can be taken from: A. Seidell, "Solubilities of Inorganic and Organic Compounds", 2nd ed., D. Van Nostrand Comp., New York, 1919, p. 536.
1 Recommendation
Central Mechanical Engineering Research Institute
Dear All,
I have a query regarding solubility of KOH in DMF. When we are trying to dissolve KOH in DMF, color of the solution turns black. What kind of reaction is taking place here?
2 Recommendations
Universidade NOVA de Lisboa
Dear Debanjan Dey ― With reference to your post above:
DMF was possibly not dry ― I suggest you check:
1 Recommendation
KOLON
As a result, you're looking for a solvent that dissolves both polymer and KOH at the same time? I think DMSO is best for your system.
Indian Institute of Technology Hyderabad
I have a query regarding solubility of NaOH in DMF at Room Temperature. When we are trying to dissolve NaOH in DMF at RT, it is not dissolving properly. I want to know the solubility of NaOH in DMF at RT.
Related Publications
It is not a simple task to develop techniques for analyzing Tricyclic Quaternary ammonium alkaloids (TCQAAs) because of the relative polarity and alkalinity of the latter. Moreover, less volatility of...
Pharmacokinetic studies constitute part of phase I clinical trials. Initiation of dosage regimen in phase II and III clinical trials depends on drug pharmacokinetics and the choice of dosing interval relies on the elimination rate constant. Consequently, inaccurate determination of these parameters can lead to unexpected drug levels and side-effect...
A selection of World Wide Web sites relevant to papers published in this issue of Current Opinion in Chemical Biology.