Sorry, I edited the post. I should have just posted this separately:Hi LDG,
You are stating that I said choline chloride = salt and that it also = antimicrobial soap and that is NOT what I said. I said that Choline Chloride is a class or type of salt. A compound yes, as I mentioned. You are correct, it is of the quarternary ammonium salts, which are in some cases used in detergents and cleaners exactly as I mentioned and has antimicrobial properties.
It does have many functions like you mentioned and in the formulation of c/d it appears it has multiple functions for cleansing. Is it the only function of its use? No. But you are referring to choline of the b-complex which is not the ingredient listed, and I am talking about choline chloride which is.
Choline chloride is an ingredient in MOST cat food. It is also used as a supplement in a lot of animal feed.
Here is the European Food Safety Authority Scientific Opinion on Choline Chloride, "Scientific Opinion on safety and efficacy of choline chloride as a feed additive for all animal species:" http://www.efsa.europa.eu/de/efsajournal/doc/2353.pdf