Alpine2048
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Mysterious black crystals from sodium salicylate?
So I recently decided to extract the salicylic acid from 17% ww wart remover for no apparent reason but for the collection of the salicylate. I did
this by adding baking soda solution until no more bubbles appeared ( i added a bit too much baking soda). The nitrocellulose precipitated or at least
gelled and was removed, with the bottom liquid being filtered. I filtered and evaporated the liquid and it started turning a light brown at the end
before completely drying. However, when I recrystallized it, I got thin, rather fluffy black residue instead, with a pH around 9-10.
I will post pictures when I get home, but does anyone have any idea what happened?
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Alpine2048
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Pictures
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Tsjerk
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Many phenols polymerize under the influence of oxygen to black tarry crap. They usually do this when deprotonated.
What is ww wart remover and what is in it?
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morganbw
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From internet search:
Active ingredient - Purpose:
Salicylic acid 17% w/w - wart remover.
Inactive ingredients: Alcohol, Camphor, Castor Oil, Collodion, Ether, Ethylcellulose, Hypophosphorous Acid, Menthol, Polysorbate 80.
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Tsjerk
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Quote: Originally posted by morganbw  | From internet search:
Active ingredient - Purpose:
Salicylic acid 17% w/w - wart remover.
Inactive ingredients: Alcohol, Camphor, Castor Oil, Collodion, Ether, Ethylcellulose, Hypophosphorous Acid, Menthol, Polysorbate 80.
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So a crap load of stuff that won't be removed with the method used by Alpine 2048.
Edit: I would have been surprised if a white product would have been obtained, let alone a pure one.
A better approach would be getting some aspirin pills and purify those. Then hydrolyze the aspirin.
[Edited on 31-1-2020 by Tsjerk]
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Alpine2048
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Yeah I guess no salicylic acid then. But at least I have some good nitrocellulose to keep!
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