CC-BY-NC-NDZdravković, MilicaSavić Jovanović, SlađanaGrekulović, VesnaStanković, Dalibor2025-11-072025-11-072025978-86-6305-164-510.5937/IOC25588Zhttps://ioc.tfbor.bg.ac.rs/public/2025/Proceedings_IOC_2025.pdfhttps://repozitorijum.tfbor.bg.ac.rs/handle/123456789/6011The compounds present in Salix alba bark (SAB) extract and its hydrolate were identified using highperformance liquid chromatography with diode array detection (HPLC-DAD). SAB extract and its hydrolate were obtained by evaporating a macerate of dried, ground white willow bark and hot distilled water. A total of 19 standard polyphenolic compounds were used for the HPLC analysis. Results indicate that only 4-hydroxybenzoic acid (4-HBA) was detected in the SAB hydrolate. In contrast, both gallic acid and caffeic acid were present in the SAB extract. The presence of 4-HBA indicates the potential possibility of using SAB hydrolate as a starting component for the synthesis of parabens and other 4-HBA derivatives. Additionally, the identification of gallic and caffeic acids in the SAB extract further confirms the effect as a cathodic inhibitor of copper corrosion in chloride environments, because both acids are proven cathodic inhibitors of copper in different corrosion environments.enwhite willow barkHPLCcaffeic acidgallic acid4-hydroxybenzoic acidconferenceObject