Home›By-products›soap scum🌐EnglishEnglishDeutschEspañol日本語EntityQ1026364· pop 6· linked from 21 articlessoap scuminformal term for the white solid that results from the addition of soap to hard waterAvailable in 6 languagesEspañolDeutsch日本語CatalanIgbovia Wikidata sitelinks · CC0ConnectionssurfactantEntitysodiumEntityCategoriesBy-productsCalcium compoundsMagnesium compoundsSoapsWater treatment