Keras
National Hazard
Posts: 896
Registered: 20-8-2018
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Removing eosin spots on skin
Folks,
for some reason, I have to use eosin as a topical antiseptic and dehydrating agent, which of course leaves persistent spots on my fingers.
Any trick to remove them easily? So far, the only ‘effective’ measure I found is to apply a pad dipped in 37% sulphuric acid. The super acid pH
causes the eosin to turn from rosy to a sort of dark yellow which is almost invisible on the skin. However, not only this is slightly (!) corrosive,
it does not remove the eosin at all, so at the next hand washing what's left of sulphuric acid is drained away and the rosy colour returns in (almost)
full.
Any other suggestion?
TIA!
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Sulaiman
International Hazard
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Registered: 8-2-2015
Location: 3rd rock from the sun
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sodium thiosulphate comes to mind,
non-toxic/corrosive - worth a try?
CAUTION : Hobby Chemist, not Professional or even Amateur
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Keras
National Hazard
Posts: 896
Registered: 20-8-2018
Location: (48, 2)
Member Is Offline
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Would it work? I’m not sure there’s anything to reduce in eosin, really. I’ll give it a shot.
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Sulaiman
International Hazard
Posts: 3695
Registered: 8-2-2015
Location: 3rd rock from the sun
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I'm thinking more of chelation than reduction.
After posting I did a little googling ;
sodium thiosulphate is used to de-colourise pigments.
eg see 'uses' here https://en.wikipedia.org/wiki/Sodium_thiosulfate
and https://en.wikipedia.org/wiki/Sodium_thiosulfate_(medical_use)
Edit : I'll try to google more before posting in future 
[Edited on 25-12-2022 by Sulaiman]
CAUTION : Hobby Chemist, not Professional or even Amateur
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