Following a request from the European Commission, the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on the application for renewal of orthophosphoric acid as a technological additive (functional group: preservatives) for all animal species. The applicant has provided evidence that the additive currently on the market complies with the existing conditions of authorisation. There is no evidence that would lead the FEEDAP Panel to reconsider its previous conclusions. Thus, the Panel concluded that the additive remains safe for all animal species provided that the optimal Ca:P ratio is maintained. Additionally, the FEEDAP Panel concluded that orthophosphoric acid remains safe for the consumer and the environment under the authorised conditions of use. Regarding the user safety, orthophosphoric acid is corrosive to the skin and eyes and should be considered as hazardous to the respiratory tract. There is no need for assessing the efficacy of the additive in the context of the renewal of the authorisation.