Can i use pigments (oxides) in lotionmaking?

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Granel

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I've bought violet manganese oxide and found out that it reacts badly in cp, also i don't make melt and pour. To avoid wasting all of it, can i use to make lotion?
 

lsg

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This from Elements Bath & Body concerining use of mineral pigments: "Not recommended for use in pH environments lower than 6 (bath bombs or lotion) as their sulphur coating may slowly release a rotten egg smell."

https://www.elementsbathandbody.com/Oxides/
 

SaltedFig

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Manganese violet is rather reactive (which is why it doesn't do well in CP soap).

Whether it would react in a lotion I don't know (I've never tried it), but I've only found it's code (C77742) in lipsticks, eyeshadow and mascara (no wet products like lotions), so I would guess it probably isn't stable in lotions.

This from Elements Bath & Body concerining use of mineral pigments: "Not recommended for use in pH environments lower than 6 (bath bombs or lotion) as their sulphur coating may slowly release a rotten egg smell."

https://www.elementsbathandbody.com/Oxides/
They seem to be referring to their own brand of coloured mica's, looking at the "Oxides" they have for sale under the comment - it looks like sparkly coloured mica. If the colour coatings they use contain sulphur, that would explain their "sulphur coating" comment.

Pure mineral oxides do not always contain sulphur in their chemical structure - Manganese violet has the chemical formula MnNH4P2O7, and does not contain sulphur (no S), most of the Iron Oxides don't, but some (like the Ultramarine blues) do.

These lists are a helpful reference for determining whether there is any sulphur in the colour chemical (look for the letter S):
https://colourlex.com/pigments/pigments-by-elements/pigments-containing-elements-p-s-se/
https://en.wikipedia.org/wiki/List_of_inorganic_pigments
 

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