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Use level of sodium metabisulphite and sodium sulphite
Please,what is the maximum use level for sodium metabisulphite and sodium sulphite anhydrous, in complexion lotion using hydroquinone at 4%
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1 Reply
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You asked maximum? That is not how I think. I work with ‘needed’ amounts.
Typically, .15% is a common amount used. I have not worked with hydroquinone, but with other projects that required a water-soluble antioxidant, and that was a typical rate.
If you skim through this patent….it will eventually lead you to a similar rate. 😉
As it is a stinky ingredient, I would lean far more towards the effective rate, vs the maximum rate. 😂
EP2047846A2 - Process for stabilizing hydroquinone - Google Patents
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This reply was modified 2 weeks, 4 days ago by Graillotion.
patents.google.com
EP2047846A2 - Process for stabilizing hydroquinone - Google Patents
The present invention addresses the problem of excessive discoloration in hydroquinone compositions of a neutral pH. Antioxidants in the hydroquinone phase and inorganic or amino acyl cationic salts of acidic ascorbyl esters, preferably sodium metabisulfite and magnesium ascorbyl phosphate respectively, … Continue reading
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This reply was modified 2 weeks, 4 days ago by
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