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Zinc omadine % usage
I’ll be getting a sample of this soon, from Lonza. It is supplied as a 50% concentration. Our intended use is in an anti-dandruff shampoo. I will be grateful if someone with experience in this area can suggest a percent concentration.
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4 Replies
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Well it looks like 1% normally … it’s going to give me problems though, has to be suspended apparently.
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0.5% to 1% is the norm with ZnPTO.
Be warned - it is extremely difficult to formulate into a stable suspension without contravening one of the hundreds, perhaps thousands, of patents that P&G have covering Head & Shoulders. Even though it was introduced in the 1960’s, P&G still have patents covering one or other aspect of the H&S formula.
My patent search engine produces 2297 hits using the keywords: zinc pyrithione procter gamble
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Don’t forget to homogenize though, as for vessels watch out for leaching.
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I think I am going to pass on this one. While I would like to have such a product in our range, I don’t have the equipment to formulate it properly. In particular the suspension issue; I’d need to homogenize under vacuum or it would be a mass of suspended bubbles. Also noted what was said by @johnb. Think I will take a look at ketoconazole instead; the bulk powder is obtainable from China. Need to look at the formulation difficulties first. Any advice appreciated.
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