New REACH Annex XIV Authorization List Substances

Authored by Emily Tyrwhitt Jones of RINA Apr 15, 2021

ECHA recommends for the European Commission to add seven substances to the REACH Authorisation List (Annex XIV), which when included cannot be used in the EU without authorisation after the relevant sunset date. Interestingly the recommendation comes 6 months prior to deadline where ECHA is obliged to submit such recommendations, which may be part of the ‘Stronger EU legal framework to address pressing environmental and health concerns’ published under the EU chemicals strategy published in October 2020.

Proposed Substances and their Uses:

Octamethylcyclotetrasiloxane (D4) (EC 209-136-7) is used in washing and cleaning products, processing aid in the semiconductor industry, polishes and waxes. Also used to manufacture silicones such as sealants that are widely used by many industries. The last application date is proposed to be 24 months after the substance inclusion in Annex XIV.

Decamethylcyclopentasiloxane (D5) (EC 208-764-9) is used in washing and cleaning products, polishes and waxes. Also used to treat textiles and as a dye additive. Also used to manufacture silicones such as sealants that are widely used by many industries. The last application date is proposed to be 24 months after the substance inclusion in Annex XIV.

Dodecamethylcyclohexasiloxane (D6) (EC 208-762-8) is used in washing and cleaning products, polishes and waxes. Also used to manufacture silicones such as sealants that are widely used by many industries. The last application date is proposed to be 24 months after the substance inclusion in Annex XIV. It is worthwhile noting at this point that in applications where substances are used as intermediates, such as use of D4 in the manufacture of ultra-pure thin layers of silicon dioxide, are not subject to authorisation.

Terphenyl, hydrogenated (EC 262-967-7) is widely used additive in tapes, electrical insulating coating compounds, epoxy resins and coatings, polyurethane potting and moulding compounds, and electric cables. It is also used in polysulphide sealants and as a plasticiser, such as in high voltage power cables and in aircraft sealants. It is also used as a heat transfer fluid. Due to its wide ranging uses many industry sectors may be impacted by its inclusion in Annex XIV. The last application date is proposed to be 21 months after the substance inclusion in Annex XIV.

Dicyclohexyl phthalate (DCHP) (EC 201-545-9) is used as a plasticiser in a wide range of polymers including PVC. Also used as an additive in resins, paints, lacquers and varnishes to aid flexibility and to provide water-resistance in ink. The last application date is proposed to be 18 months after the substance inclusion in Annex XIV.

Disodium octaborate (EC 234-541-0) is used in paints, lubricant, adhesives and construction materials. The last application date is proposed to be 24 months after the substance inclusion in Annex XIV.

Benzene-1,2,4-tricarboxylic acid 1,2-anhydride (trimellitic anhydride, TMA) (EC 209-008-0) has no uses in the scope of the authorisation but it is included to avoid regrettable substitution in epoxy resin hardeners. The last application date is proposed to be 18 months after the substance inclusion in Annex XIV.