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Anyone ever try KOINSOLV to conserve a coin?
Insider2
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I've found that this is a pretty good chemical to remove grime from coins. It seems to work similar to acetone but I don't know its composition or the chemistry. Stay tuned until the end of the poll for a possible surprise. 
Anyone ever try KOINSOLV to conserve a coin?
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no never have
I bought a can of it years ago, still have it,, Never tried it.
It is an organic solvent mixture: propanol, propyl bromide. It's a commercial degreaser so it is probably a bit harsher as a solvent than acetone - although it shouldn't touch the metal itself.
Is this from E&T Kointainer Company of Sidney, OH?
Yes.
Yes, n-Propyl bromide, 1-Propanol, Oxygenated hydrocarbons, and Epoxybutane.
It is (or used to be, if he is marketing a new product under the old name) trichlorotriflouroethane. Darned good coin solvent. However, it is one of the types of products that damage the ozone layer. The government drove it out of the market with a prohibitively high tax, which is why E&T stopped selling it over 10 years ago.
Well, surprise, surprise...I must be the last one to know.
Yes, if you "google" "propyl bromide degreaser" they discuss it as a chlorofluorocarbon replacement in vapor degreasers.
I used to get trichlorotrifluoroethane from the university chem lab when it was available. Great stuff for removing PVC plasticizer. The Koinsolv formula is the propyl-bromide et al, since at least the late 90s. I ordered some and got the SDS to see what was in it. IMO, it didn't work any better than acetone on PVC residue, so I didn't buy any more
Sounds similar to what happened to Blue Ribbon.
The original formulation contained the ozone reducing chloro/fluorocarbons and worked
great on copper. The newer stuff you may as well use light machine oil. Fortunately I have an ample supply of the original, and I use it very sparingly
I've used Acetone before, but not on a coin.
We used it as a de-glazer on our rollers in what we call the roller train.
Form rollers etc...Sometimes 40 or so rollers. Nasty stuff , but efective.
Knowing what its capable of i would never use that on a coin, worring about the patina.
Tell one thing try to put it in a cup , and let the fun begin.
Love to find a way to clean some....But acetone or anything perfumey simular, run for the hills,
or just get your nails done. Ehhh !
Although I have not tried Koinsolve, it has been mentioned on the forum before. Not sure why I missed this one during the couple of years I was doing all my experimentation... but as an organic solvent, it should do well without harming the metal. Cheers, RickO
I had a can that was so old, that it rusted a hole on the bottom and leaked on my shelf.
E&T had coin dissolve that was the best I have seen, I used on some cheap proofs in the 1980s and they are still crystal clear. Besides the cancer connection if the cap was not tight with tape around it it would evaporate quickly.