filter4dFILTERED meaning: 1. past simple and past participle of filter 2. to appear or happen gradually or to a limited…. Learn more.フェノールレッド liquid, 0.5%, sterile-filtered, BioReagent, suitable for cell culture; CAS Number: 143-74-8; Synonyms: Phenolsulfonphthalein solution at Sma-Aldrich