What vinegar acidity is necessary to effectively kill household mold?
5% appears to be adequate per a brief search of the web.
30% is not really &quot;vinegar&quot; anymore - call it acetic acid and treat with care.
I have seen 10% sold as &quot;cleaning vinegar&quot; but I don't find any results in a quick search indicating it's much more effective than undiluted 5% on mold.