This draft Commission Implementing Regulation approves formaldehyde released from the reaction products of paraformaldehyde and 2-hydroxypropylamine (ratio 1:1) as an existing active substance for use in biocidal products of product-types 2, 11 and 13. The substance meets the exclusion criteria set out in Article 5(1) of the Regulation (EU) No 528/2012, but fulfils the condition for derogation of Article 5(2)(c) of that Regulation. The placing on the market of treated articles treated with or intentionally incorporating this substance will be subject to restrictions and conditions. Only certain specific treated articles will be allowed to be placed on the market