
European Economic Area
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The European Chemicals Agency (ECHA) has added Bis(α,α-dimethylbenzyl) peroxide, a flame retardant identified as toxic for reproduction, to its Candidate List of substances of very high concern (SVHC), bringing the total to 241 entries. This inclusion requires companies to adhere to strict regulations, inform customers if articles contain over 0.1% of this chemical, and notify ECHA within six months if total imported tonnage exceeds 1 tonne per year. Potential future regulations could add this substance to the Authorisation List, requiring companies to seek permission for continued use. ECHA’s actions aim to protect public health and the environment by ensuring safe handling and usage of hazardous chemicals.
Published in July 2024. Dates, deadlines and stages may have changed since.
3 min readAI-drafted, expert reviewed

The European Chemicals Agency (ECHA) has added bis(α,α-dimethylbenzyl) peroxide, a chemical known for its reproductive toxicity, to its Candidate List of substances of very high concern (SVHC). This update brings the total number of entries on the list to 241, each representing chemicals that pose significant risks to human health and the environment.
Bis(α,α-dimethylbenzyl) peroxide, commonly used as a flame retardant, has been identified by ECHA as toxic for reproduction. This designation means that companies using this chemical must adhere to strict regulations to manage its risks and ensure the safety of consumers and workers.
Substance Name: Bis(α,α-dimethylbenzyl) peroxideEC Number: 201-279-3CAS Number: 80-43-3Usage: Flame retardant
The decision to include this substance was confirmed by ECHA’s Member State Committee (MSC), which plays a crucial role in the evaluation and identification of SVHCs. The inclusion of bis(α,α-dimethylbenzyl) peroxide highlights ECHA’s commitment to monitoring and regulating hazardous chemicals in the EU market.
Bis(α,α-dimethylbenzyl) peroxide might eventually be added to the Authorisation List. Should this occur, companies would need to seek authorisation from the European Commission to continue its use, ensuring that the risks are properly managed and minimised.
In related news, the MSC was set to review triphenyl phosphate (TPhP) for possible inclusion as an SVHC. However, new information surfaced shortly before the June meeting, prompting ECHA to suspend the decision-making process. This pause allows for a comprehensive review of the new data to ensure an accurate assessment.
With the inclusion of new substances on the Candidate List, companies face several regulatory obligations. Under the REACH regulation, firms must inform customers and consumers if any articles they supply contain more than 0.1% of a listed SVHC. This information is crucial for ensuring safe use and handling of potentially dangerous chemicals.
Additionally, importers and producers must notify ECHA within six months if their products contain any newly listed SVHCs. Suppliers are also required to update safety data sheets for any affected products to reflect the latest information on safe usage.
ECHA’s actions are part of a broader effort to protect public health and the environment from the risks posed by hazardous chemicals. By continuously updating the Candidate List and enforcing strict regulations, ECHA aims to ensure that companies comply with safety standards and that consumers are well-informed about the products they use.
Official source
echa.europa.euTopics
Bis(α,α-dimethylbenzyl) peroxide is a chemical commonly used as a flame retardant synergist. It has been identified by the European Chemicals Agency (ECHA) as toxic for reproduction, which means it poses significant risks to human health, particularly concerning reproductive toxicity. Due to these hazards, it has been added to ECHA’s Candidate List of substances of very high concern (SVHC).
Companies using Bis(α,α-dimethylbenzyl) peroxide must adhere to strict regulations to manage its risks and ensure the safety of consumers and workers. They must inform customers if any articles they supply contain more than 0.1% of this SVHC. Additionally, importers and producers need to notify ECHA if imported articles contain SVHCs greater than 0.1% w/w and the total imported volume is greater than 1 tonne per year. There may be other requirements under other legislation such as the Waste Framework Directive.

Dr Steven Brennan
CEO and co-founder of Foresight, and a co-opted member of ECHA's Committee for Socio-economic Analysis. He holds a PhD in chemical engineering.
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