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Formaldehyde as a colour preservative
Can we use Formaldehyde in our product to preserve the colour ? We intend to prevent the fading of food grade colours in our product (liquid hand wash,liquid dishwash).
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12 Replies
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That depends on what you specifically mean by “formaldehyde”, where you are selling it, and what level you want to use it at. However, I doubt you’ll get much color protection but you could test it.
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Formaldehyde as Formalin. I do not know the quantity to be used. I am more concerned about its hazardous nature and it being legally used for handwash formulations.
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Where are you selling it?
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We sell this product in a middle eastern country.
My question is that “is Formaldehyde ever used in such products” ? -
Formalin is not used in hand wash formulations any longer. If you want to use “formaldehyde” you would use a formaldehyde donor like DMDM Hydantoin.
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DMDM Hydantoin is known to be an antimicrobial agent but what we intend is the preservation of colour. What other colour preservative could we use ?
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For that you would use an antioxidant like BHA or BHT
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What percentage of BHA or BHT is recommended ?
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0.01% - 0.1% The supplier will give you suggestions.
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you could also use benzophenone-4 to prevent discolouration, as it’s a radical trap - 0.1% works well for all but the most light-sensitive colours
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See CA Prop 65 … & banned in some countries due to effects on marine life.
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Perry said:That depends on what you specifically mean by “formaldehyde”, where you are selling it, and what level you want to use it at. However, I doubt you’ll get much color protection but you could test it.
For colour protection from UV , Benzophenon is used , I am using Benzophenon 4 .
My experience is , if tap water is used , colour may change periodically and at high pH colour will change . Using DM water he can over come this colour problem .
For UV protection Benzophenon 4 can be used .
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