Sanz Sánchez, TatianaGiménez Arnau, Ana MaríaZaragoza Ninet, VioletaCórdoba Guijarro, SusanaMiquel Miquel, Francisco JavierSilvestre Salvador, Juan FranciscoGonzález Pérez, RicardoRuiz González, InmaculadaMercader García, PedroSerra Baldrich, EstherEt.al.2026-01-272026-01-272025Sánchez, T. S., Giménez‐Arnau, A. M., Ninet, V. Z., Guijarro, S. C., Miquel, F. J. M., Salvador, J. F. S., Pérez, R. G., González, I. R., Mercader‐García, P., Baldrich, E. S., Carrillo, J. M. C., Romero, F. T., De Frutos, F. J. O., Serna, M. R., Ortega, M. E. G., Suárez, C. P., Navarro‐Triviño, F., Chicharro, P., Nieto, M. A. P., … Borrego, L. (2025). Discordant patch test reactions to 2‐bromo‐2‐nitro‐propane‐1,3‐diol (Bronopol): A multicenter study from reidac. Contact Dermatitis, cod.70082. https://doi.org/10.1111/cod.700820105-18731600-0536https://hdl.handle.net/11268/167652-Bromo-2-nitro-propane-1,3-diol (bronopol) is a formaldehyde releaser that was included as an emerging allergen needing to be evaluated in the European series in 2019, and as a candidate allergen for inclusion in the Spanish baseline series based on data from the Spanish Registry for Research in Dermatitis and Contact Allergy (REIDAC), in TRUE Test 0.25 mg/cm2 or 0.5% pet. in 2022. In a previous Spanish study, we perceived a frequency of sensitization to bronopol of 0.36% (15/4088) and we noted that the TRUE Test detected 13 of 15 overall reactions to bronopol. We found a current relevance of 6/13 in TRUE Test and none in petrolatum. However, one limitation of this work was that the data could not be directly compared because they came from different populations. The present study was then designed within REIDAC due to differences, with the aim of updating epidemological data regarding sensitizations to bronopol and evaluating discordant patch test reactions to bronopol.engDermatititsFormaldehídoErupciones por Medicamentosjournal article10.1111/cod.70082restricted accessQuímico farmacéuticoEnfermedad de la pielInvestigación médicaGoal 3: Ensure healthy lives and promote well-being for all at all ages