I’ve always hated Kopertox. It’s harsh, stains, and makes a sticky mess.
For deep thrush, I like to use antibiotic ointments, such as those found in dry cow mastitis treatments.
Thrush is, after all, a bacterial infection. (Fusobacterium necrophorum, though I miss its previous designation of Spherophorus necrophorus–so much more melifluous.)
For those uncomfortable with antibiotic use, perhaps chlorhexidine or povidone iodine ointment would be acceptable.
If it looks like any Koppertox bottle I’ve seen, no way you can read the fine print through all the green stains 
And yes, I said it with a C in my first post, but it should be with a K. Talking about actual copper got me confused I guess.
Napthalene is a specific compound with 10 carbons and 8 hydrogens. It is flat and has a special stability (AKA aromaticity) due to its flatness, number of delocalized electrons and ring structure. You can see the structure in the linked Wikipedia article; each bend represents a carbon atom that is bonded to enough hydrogens to make the carbon happy. Because its special stability is associated with a number of electrons it would not be a happy camper if it had to add more electrons which is what would need to happen for it to become an anion to balance the copper cation. Napthalene is used in mothballs, which I think somewhat mentioned upthread.
Napthenates are not a specific compound, but a group of compounds (or ions). They are formed by removing one hydrogen, sans electrons, from a naphthenic acid. The resulting napthenate thus has a negative charge to balance the positive charge of the copper. Napthenic acids are a group of compounds that include a cyclic structure of five or six carbons plus other carbons and are carboxylic acids. There’s an example of one here–again the bends are all carbon atoms with enough hydrogens attached to keep them happy. Acetic acid (vinegar is a solution of this) is an example of a carboxylic acid; its anion is acetate.
So, even though both napthalene and napthenates include carbons in a ring in their structure, they’re pretty different structurally. The napthenates are not flat and for this reason and a host of others are not considered to be aromatic in the chemical sense.
Wikipedia article on copper napthenate in case anyone is still reading.
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This relates to nothing about thrush, but I once worked with a woman who stored a heavy fabric (maybe suede?) green pantsuit in mothballs. Every winter she pulled it out and when she wore it you could smell her coming for miles. I always wondered how she could stand it for an entire eight-hour day, when it was hard to be in her presence for more than a minute or so.
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I miss Spherophorus necrophorus!
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Lol -but, I’m intrigued as to why you brought this up.
Just talking about napthalene and mothballs - anytime anyone mentions it I immediately remember that pantsuit smell. I have never used Koppertox, but I take it it is has a similar odor?
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No bc mothballs contain naphthalene (or para-dichorobenzene) and Koppertix does not. The predominate thing you smell with the latter is the solvent or solvents.
