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Over neutralized carbopol solution
Greetings.
I made a batch of 400 liters of water/isopropyl alcohol 50/50 and added carbopol to increase the viscosity, but I made an error using too much NaOH in order to neutralize the solution but now the solution lose the viscosity , the ph is 10.5-10.7.
I want to know if I can use citric ácid to get ph 7 and gain the thickness.
Any suggestions will be helpful -
4 Replies
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Probably but I am not sure. The logical thing to do is to take a one litre sample of what you have now, and try bringing it back to pH 7 and see what happens.
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Thanks belassi, i did that with Acetic acid, but nothing happened.
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Bummer. This sounds like a hand sanitiser you are making. I would set aside 10L of it and begin experimenting with 1Kg at a time to see what will work. Since carbomer is low % use I would begin by neutralising with citric acid to pH 7 then add more carbomer and then try re-neutralising with the correct amount of NaOH.
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Try 7 parts of partially neutralized carbopol dispersion with 3 parts of your high pH recipe, check how much the pH comes down. Try it on the lab scale and then proceed further.
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