On June 25th, 2025, The European Chemical Agency (ECHA) added an additional 3 hazardous chemicals to the substances of very high concern (SVHC) Candidate List. The second update for 2025 brings the total number of substances on the SVHC Candidate List to 250.
The ECHA had previously added 5 hazardous chemicals to the SVHC Candidate List on January, 21st 2025. The ECHA also updated a previous substance, Tris(4-nonylphenyl, branched and linear) phosphite, in the January release.
The 3 Substances Included in the June 2025 SVHC Candidate List Update
Electronics manufacturers need to be aware of the 3 substances added to the SVHC Candidate List as they may be used in components in their bills of materials (BOMs).
- 1,1,1,3,5,5,5-heptamethyl-3-[(trimethylsilyl)oxy]trisiloxane (CAS Number: 17928-28-8)
- Decamethyltetrasiloxane (CAS Number: 141-62-8)
- Tetra(sodium/potassium) 7-[(E)-{2-acetamido-4-[(E)-(4-{[4-chloro-6-({2-[(4-fluoro-6-{[4-(vinylsulfonyl)phenyl]amino}-1,3,5-triazine-2-yl)amino]propyl}amino)-1,3,5-triazine-2-yl]amino}-5-sulfonato-1-naphthyl)diazenyl]-5-methoxyphenyl}diazenyl]-1,3,6-naphthalenetrisulfonate; Reactive Brown 51
The update includes Decamethyltetrasiloxane which is used in automotive care products, which is important to note for companies with products in the industry.
The 5 Substances Added in the January 2025 SVHC Candidate List Update
According to the ECHA, the 5 substances added to the SVHC Candidate List in January can be found in the manufacturing of electronics, as well as lubricants, greases, and other metal working fluids.
- 6-[(C10-C13)-alkyl-(branched, unsaturated)-2,5-dioxopyrrolidin-1-yl]hexanoic acid (CAS Number: 2156592-54-8)
- O,O,O-triphenyl phosphorothioate (CAS Number: 597-82-0)
- Octamethyltrisiloxane (CAS Number: 107-51-7)
- Perfluamine (CAS Number: 338-83-0)
- Reaction mass of: triphenylthiophosphate and tertiary butylated phenyl derivatives (CAS Number: 192268-65-8)
According to the ECHA, Octamethyltrisiloxane and Perfluamine are very persistent and very bioaccumulative, posing potential harm to the environment and organisms.Similarly, Â O,O,O-triphenyl phosphorothioate and the reaction mass of: triphenylthiophosphate and tertiary butylated phenyl derivatives have persistent, bioaccumulative and toxic properties.
The ECHA update called out 6-[(C10-C13)-alkyl-(branched, unsaturated)-2,5-dioxopyrrolidin-1-yl]hexanoic acid as toxic for reproduction, and updated its previous entry for Tris(4-nonylphenyl, branched and linear) phosphite on the same basis.
The Candidate List now has 250 entries, though some are groups of chemicals, so the overall number of impacted chemicals is higher.
The full details of the added and updated chemicals in the 2025 REACH SVHC candidate list:
| Substance Name | CAS Number | Reason for Inclusion | Examples of Use | Â |
|---|---|---|---|---|
| June 2025 Update | Â | |||
| 1,1,1,3,5,5,5-heptamethyl-3-[(trimethylsilyl)oxy]trisiloxane | 17928-28-8 | Very persistent and very bioaccumulative, vPvB (Article 57e) | Used as a laboratory reagent, in cosmetics and personal care products and perfumes and fragrances | Â |
| Decamethyltetrasiloxane | 141-62-8 | Very persistent and very bioaccumulative, vPvB (Article 57e) | Used in cosmetics and personal care products, in lubricants and greases and in automotive care products | Â |
| Tetra(sodium/potassium) 7-[(E)-{2-acetamido-4-[(E)-(4-{[4-chloro-6-({2-[(4-fluoro-6-{[4-(vinylsulfonyl)phenyl]amino}-1,3,5-triazine-2-yl)amino]propyl}amino)-1,3,5-triazine-2-yl]amino}-5-sulfonato-1-naphthyl)diazenyl]-5-methoxyphenyl}diazenyl]-1,3,6-naphthalenetrisulfonate; Reactive Brown 51 | – | Toxic for reproduction (Article 57c) | Used in textile treatment products and dyes |  |
| January 2025 Update | Â | |||
| 6-[(C10-C13)-alkyl-(branched, unsaturated)-2,5-dioxopyrrolidin-1-yl]hexanoic acid | 2156592-54-8 | Toxic for reproduction (Article 57c) | Lubricants, greases, release products and metal working fluids | Â |
| O,O,O-triphenyl phosphorothioate | 597-82-0 | Persistent, bioaccumulative and toxic, PBT (Article 57d) |
Lubricants and greases | Â |
| Octamethyltrisiloxane | 107-51-7 | Very persistent, very bioaccumulative, vPvB (Article 57e) |
Manufacture and/or formulation of: cosmetics, personal/health care products, pharmaceuticals, washing and cleaning products, coating and non-metal surface treatment and in sealants and adhesives | Â |
| Perfluamine | 338-83-0 | Very persistent, very bioaccumulative, vPvB (Article 57e) |
Manufacture of electrical, electronic and optical equipment and machinery and vehicles | Â |
| Reaction mass of: triphenylthiophosphate and tertiary butylated phenyl derivatives | 192268-65-8 | Persistent, bioaccumulative and toxic, PBT (Article 57d) |
No active registrations | Â |
| Updated Entry | Â | |||
| Tris(4-nonylphenyl, branched and linear) phosphite | – | Endocrine disrupting properties (Article 57(f) – environment) | Polymers, adhesives, sealants and coatings |  |
Source: ECHAÂ
SVHC Candidate List Updates and How Businesses Can Comply
The REACH SVHC Candidate List is a list of substances that have been identified as being of very high concern for human health or the environment. Companies typically must comply with REACH if they manufacture or distribute any product in the EU that contains an SVHC in an amount exceeding the regulatory threshold. Once a substance is added to the Candidate List, companies may have several obligations to comply with, including:
- Providing information to customers about the presence of the substance in their products
- Providing notice to the ECHA regarding products containing the substance
- Minimizing the release of the substance into the environment
- Developing alternative substances or processes that do not pose the same risks
Manufacturers and importers that are subject to the notification requirement must submit notice to the ECHA if their article contains a Candidate List substance within six months from the date it has been included in the list. Substances 1-5 listed above were added on January 21st, 2025, which means companies have until July 21st to comply.
Assessing and Satisfying REACH Regulatory Obligations
Navigating REACH SVHC regulations can be complex, but proactive measures can help avoid compliance issues. Managing your exposure may include in-depth review of your BOMs, monitoring regulatory updates, obtaining expert guidance and sourcing safer alternatives. Utilizing software tools for REACH compliance management can streamline the process and minimize errors by connecting users with the documentation to meet their obligations.
Industry leaders utilize SiliconExpert to help manage REACH compliance across their BOMs and approved component lists (ACLs). With SiliconExpert, compliance managers, procurement teams and engineers can:
- Identify SVHCs in their products and components.
- Generate REACH-compliant documentation and reports effortlessly.
- Receive alerts about regulatory changes to proactively address potential risks.
By partnering with SiliconExpert, companies gain the confidence and clarity needed to navigate the complexities of REACH SVHC compliance.
