“Ethanol” is ethanol or ethyl alcohol, a 2-carbon alcohol, not”denatured alcohol likely with isopropanol “. Propanol and isopropanol are two different isomeric 3-carbon alcohols. Not that it matters much. I would not recommend denatured alcohol for cleaning LPs, however.
pH 8.6 I would say is at least mildly alkaline, probably OK. Most soaps are.