Chemical Forums
Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: pkuk on February 19, 2021, 10:01:23 AM
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HI, I am hopeless at chemistry and need some advice. I work as a vet.
I have a dog who I have prescribed a 4% solution of chlorhexidine to shampoo over his body. The thing is that this particular preparation does not lather well. I tend to suggest using another basic shampoo that has a moisurising base to mix with it, so the chlorhexidine lathers a bit more and the skin can stay moisturised. The thing is, if I mix 2 capfuls or however many of the chlorhexidine with a little bit of the other shampoo. will this dilute the chlorhex to a lower solution, say 3%, or will it still stay at 4%. Sorry, probably a stupid question.
Thanks in advance
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How do you prepare the 4% solution?
Instead of Shampoo A you use Shampoo B.
Or do you mix both?
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The 4% solution already comes made.
I mix it with the other shampoo which is also commercially made, but has no active ingredients (just moisturisers)
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Ok then its like a dilution. Let say you have 1 liter 4% solution and you add 1 liter Shampoo. Then you have 2 liter of a 2% solution.
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ok, i get that, except in this case, I am going to apply a large strip of the shampoo B formulation on the animal and then will add 2 capfuls (arbitrary size) of the 4% chlorhexidine. So its not a equal by equal dilution per se, shampoo B is just acting as a moisturiser formulation.
Can I still get away with the 4% solution still being 4% ish by the time I have mixed both?
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I doesnt matter what you mix. The new solution is everytime lower as 4%.
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ok cool
so if i just shampoo'd using the 4% solution and nothing else, i.e. mixing it water etc on the hair (as people do), then it will dilute it away from 4% anyway.
Do u think they make them a little more concentrated then in order to account for this?
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I dont think so. The solution is working how it is. I wouldnt worry about it.