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Turbidity in mineral oil
Hello to all,
I am developing hair oil based on Mineral oil but facing a problem of formation of turbidity in mineral oil i.e.light liquid paraffin at accelerated temp. of 45c-75%RH which may be due to humidity in the stability chamber. Mineral oil may contain some foreign matter or something to make it turbid. My problem is that M.oil is so cheap that unable to replace. I tried M.oil from different suppliers also but failed all and main thing I would like to mention here is that all marketed hair oils containing M.oil more than 60-70% turned to turbid at same temp. Please suggest me, if anybody experienced and solved such type of problem. Thanks…… -
7 Replies
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This is a common (and probably unsolvable) problem. In order to be able to get hair oils to rinse out of hair, you need to incorporate some level of surfactants into your product. But those surfactants, in the presence of humidity, will inevitably start to emulsify, causing turbidity. It’s unavoidable.
Now, if you’re getting turbidity in 100% mineral oil, you have a different problem that probably is contamination of some kind. I’ve never seen a turbidity problem in pure mineral oil at temps above freezing.
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Thanks Bob, yes turbidity is in 100% mineral oil and i am in a discussion with supplier but he is claiming that it is a purified grade which is supplying to most of the MNC’s and but the thing is that it happened at RH only not at dry stability oven (even at 55c-60c). I thought moisture entered in M.oil but it is enclosed in tightly fitted pet bottle. As i mentioned above, same turbidity is observed in most of the well known marketed brands (based on M.oil) which is still unsolved from their side too.
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That is truly odd. Have you tried looking at stability with a perfectly sealed/ air-tight container?
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Yes, it perfectly sealed container.
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Even I checked in perfectly sealed pouch too and observed same result.
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That is very strange. You need to ask your supplier for an analytical test report, I think.
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Is the turbidity permanent? Does clarity return on cooling?
You state that you are testing in PET containers. Does the turbidity occur on tests in glass bottles?
A better test of this would be glass ampoules (sealed by fusion of the glass) as is done with injections. You could then eliminate any effects from bottle caps/wads etc.
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