Cyclosiloxanes, including D4, D5, and D6, are a class of organosilicon compounds with unique chemical structures. Widely used across multiple industries, they have also drawn significant attention due to their potential environmental and health risks. This article provides a comprehensive overview of the EU’s recent regulatory developments targeting these substances.

On February 28, 2025, the European Chemicals Agency (ECHA) initiated a public consultation under the EU REACH Regulation (Registration, Evaluation, Authorization, and Restriction of Chemicals) regarding proposals to list three substances as Substances of Very High Concern (SVHCs). Stakeholders may submit scientific or technical comments by April 14, 2025.

On February 18, 2025, the European Chemicals Agency (ECHA) proposed adding n-hexane to the Substances of Very High Concern (SVHC) Candidate List due to its probable serious effects on human health. Currently, the relevant dossier for n-hexane is being actively prepared by the proposer and is expected to be submitted by August 4, 2025.

January 21, 2025, the European Chemicals Agency (ECHA) has officially announced the 33rd batch of 5 substances of very high concern (SVHC), bringing the total number of substances on the SVHC list (also known as the Candidate List) to 247.

The European Chemicals Agency (ECHA) plans to expand its Candidate List of Substances of Very High Concern (SVHCs) by adding six substances from January 6, 2025, taking the total to 248. Octamethyltrisiloxane is among the new additions.

November 7, 2024, the European Chemicals Agency (ECHA) has officially announced the 32nd batch of 1 substances of very high concern (SVHC), bringing the total number of substances on the SVHC list (also known as the Candidate List) to 242.

On June 20, 2024, the European Chemicals Agency (ECHA) identified tris(4-nonylphenyl, branched) phosphite and 6-[(C10-C13)-alkyl-(branched, unsaturated)-2,5-dioxopyrrolidin-1-yl]hexanoic acid as a potential Substances of Very High Concern (SVHC). The proponents are finalizing the necessary documentation, expected to be submitted by August 1, 2024. Following this, ECHA will initiate a public consultation, inviting feedback from stakeholders to inform the decision on whether these substances should be included in the next SVHC candidate list.

The European Chemicals Agency (ECHA) has officially announced the 31st batch of 1 substances of very high concern (SVHC), bringing the total number of substances on the SVHC list (also known as the Candidate List) to 241.

On March 1, 2024, ECHA released two substances proposed to be added into the SVHC Candidate List for public consultations. Comments are welcomed before April 15, 2024. ECHA regularly updates the SVHC Candidate list twice a year. So far, the total number of substances on the SVHC list (also known as the Candidate List) has reached 240.

Helsinki, 14 June 2023 - The European Chemicals Agency (ECHA) has officially announced the 29th batch of 2 substances of very high concern (SVHC), bringing the total number of substances on the SVHC list (also known as the Candidate List) to 235.