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News > REACH related regulations and current affairs > Latest EU Regulation: REACH Annex XVII Expands Control of Cyclosiloxane Substances

Latest EU Regulation: REACH Annex XVII Expands Control of Cyclosiloxane Substances

  • 2025-07-07

REACH Annex XVII is a significant regulatory change that will have a significant impact on the chemicals and manufacturing industries.

REACH Annex XVII 一項重要的法規變更,這將對化學品和製造行業產生重大影響。

On May 17, 2024, the EU issued Regulation (EU) 2024/1328 via EUR-Lex. This revised Entry 70 of REACH Annex XVII, adding three cyclosiloxane substances—D4, D5, and D6—that can be used in the production of adhesives, sealants, coatings, rubber, and resins to stricter regulations. 

Regulatory changes: 

Old Entry 70 Controlled SubstancesNew Entry 70 Controlled Substances
辛甲環四矽烷
Octamethylcyclotetrasiloxane (D4)
CAS No. 556-67-2
EC No 209-136-7

十甲基環戊矽氧烷
Decamethylcyclopentasiloxane (D5)
CAS No. 541-02-6
EC No 208-764-9
辛甲環四矽烷
Octamethylcyclotetrasiloxane (D4)
CAS No. 556-67-2
EC No 209-136-7

十甲基環戊矽氧烷
Decamethylcyclopentasiloxane (D5)
CAS No. 541-02-6
EC No 208-764-9

十二甲基環己矽氧烷
Dodecamethylcyclohexasiloxane (D6)
CAS No. 540-97-6
EC No 208-762-8
Old restriction rangeNew restrictions
After January 31, 2020, cosmetic detergents containing any substance in a concentration equal to or greater than 0.1% by weight shall not be placed on the market.As a single substance, as a component of other substances, or as a component of a mixture, if the substance is equal to or greater than 0.1% (by weight), it shall not be placed on the market, effective June 6, 2026.
上一頁PreviousLatest EU regulations: REACH Annex XVII adds perfluorohexanoic acid (PFHxA), its salts, and PFHxA-related substances to the list
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