A Note on Silver

As a result of the recent classification update, the biocidal regulations pertaining to silver (Ag) compounds are questions that we are being asked more frequently here at BioCote®. We can confirm that no classification change to BioCote® silver ion technology, currently under Union review, has been made. BioCote® silver ion technology is viewed as low risk, and therefore, the Union review is likely to be an extended process whilst high-risk substances are prioritised and evaluated.

Our active substance is permitted for use in biocidal applications with the approved product types (PT) according to the Biocidal Products Regulation (BPR) of the European Chemicals Agency (ECHA). 

Silver salts, such as silver chloride and silver nitrate, are to be reclassified as ‘Reproductive Toxicity 1B’.  With reference to Article 5 of ECHA, an active substance that is classified as category 1A or 1B, according to the classification, labelling and packaging of substances and mixtures (CLP) Regulation, is not approved for use in biocidal applications. This is because Category 1A/1B is the highest level of hazard classification. 

Silver powder (i.e., metallic silver) will be reclassified as ‘Reproductive Toxicity 2’, according to CLP Regulation. It is important to note that a reproductive classification of category 2 does not exclude an active substance for biocidal use.

The reclassification changes are expected to be confirmed 2025-2026.