water-soluble
From Longman Dictionary of Contemporary EnglishRelated topics: Chemistrywater-solubleˈwater-ˌsoluble adjective HCLIQUIDa water-soluble substance is solid but becomes liquid when mixed with waterExamples from the Corpuswater-soluble• More than 50% of oat bran fibre is water-soluble compared to eight percent of what bran fibre.• When watercolour is combined with gouache, or with the new water-soluble drawing media, the results can be quite striking.• Vitamins: Both fat and water-soluble vitamins are essential to fish health.• The water-soluble vitamins, B and C are particularly at risk and levels can fall even further if food is kept hot.