Flame Retardants and Fire Safety: How to Properly Assess Risks According to REACH and CLP

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Flame retardants are an essential component of many industrial materials, from plastics to textiles and building materials. Their role is to slow the spread of flame and increase the fire resistance of products. However, not all flame retardants are equally effective—and more importantly, their use is subject to strict legislative requirements. Under the REACH regulation, every chemical substance must be registered and assessed for risks, while CLP/GHS determines how it must be classified and labeled. For manufacturers and processors, it is crucial not only to select the right type of flame retardant but also to ensure that its use complies with applicable regulations and safety standards.

Basic principles of flame retardants and their role in fire safety

Flame retardants, often referred to as fire retardants, are chemical substances or mixtures that slow down or prevent the spread of flame in materials. Their effectiveness lies in interfering with the chemical processes of combustion, either physically (e.g., by forming a protective layer) or chemically (e.g., by capturing free radicals). In industrial applications, they are primarily used in plastics, textiles, coatings, adhesives, and construction materials, where they enhance resistance to ignition and limit the rate of fire spread. The correct choice of flame retardant depends on the type of material, its processing conditions, and the required level of protection. For example, halogenated flame retardants are highly effective but their use is restricted due to environmental and health risks, whereas halogen-free alternatives (e.g., phosphorus- or nitrogen-based) offer a more balanced safety profile.

In the context of fire safety, flame retardants play a key role in meeting legislative requirements, such as standards for material flammability in transportation, construction, or electronics. Their effectiveness is evaluated using standard test methods that simulate real fire conditions, for example by measuring the rate of flame spread, smoke production, or the release of toxic gases. The results of these tests are crucial for classifying materials according to applicable regulations and for determining their suitability for specific applications. When selecting a flame retardant, it is therefore essential to consider not only its technical effectiveness but also its compatibility with other material components and long-term stability.

Legislative Framework: REACH and CLP as Key Tools for Risk Assessment

The regulation of flame retardants in the European Union is primarily based on the REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) and CLP (Classification, Labelling and Packaging) regulations. REACH requires that all chemical substances manufactured or imported in quantities exceeding one tonne per year be registered with the European Chemicals Agency (ECHA), including detailed information on their properties, uses, and risks. For flame retardants, this means the obligation to demonstrate not only their effectiveness but also their potential impacts on health and the environment. Some substances, such as certain brominated flame retardants, are included on the list of substances of very high concern (SVHC) and are subject to authorisation procedures, which restrict their use to the necessary minimum.

The CLP Regulation then sets out the rules for the classification, labelling and packaging of chemical substances and mixtures, including flame retardants. Under CLP, substances and mixtures must be labelled with hazard symbols, standard hazard statements (H-phrases) and safety handling instructions (P-phrases). This allows users to quickly identify potential risks and take appropriate protective measures. For example, flame retardants containing substances classified as toxic if inhaled or hazardous to the aquatic environment must be labelled with the relevant hazard symbols and supplemented with instructions to minimise exposure. Compliance with these regulations is essential not only for the legal placing of products on the market, but also for ensuring the safety of workers and end-users.

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Safety Data Sheets (SDS) and their importance for the proper handling of flame retardants

A Safety Data Sheet (SDS) is a fundamental document that provides comprehensive information on chemical substances and mixtures, including flame retardants. Under the REACH regulation, an SDS must be available to all professional users and must contain 16 mandatory sections covering substance identification, composition, hazard information, first aid measures, fire-fighting instructions, handling and storage, exposure limits, and other critical data. For flame retardants, Section 2 (Hazard Identification), which lists the classification according to CLP, and Section 5 (Fire-Fighting Measures), which specifies requirements for extinguishing agents and protective equipment in case of fire, are particularly important.

A properly prepared SDS enables users to assess the risks associated with a specific flame retardant and take measures to minimize them. For example, Section 7 (Handling and Storage) provides recommended storage conditions, such as temperature, humidity, or separation from incompatible substances that may affect the stability of the flame retardant. Section 8 (Exposure Controls/Personal Protection) then specifies maximum permissible concentrations (e.g., occupational exposure limits) and recommended protective equipment, such as gloves, safety goggles, or respirators. For manufacturers and processors, it is crucial to regularly update the SDS in line with the latest scientific findings and legislative changes to ensure ongoing compliance with regulations and workplace safety.

Practical Steps for Risk Assessment and Selection of a Suitable Flame Retardant

Risk assessment for flame retardants begins with a thorough analysis of the requirements of the specific application. Factors such as the type of material in which the flame retardant will be used, its processing conditions (e.g., temperature, pressure), and expected conditions of use (e.g., exposure to high temperatures, humidity, or mechanical stress) must be considered. It is also necessary to evaluate potential exposure scenarios for workers handling the substance, as well as for end users of the product. For example, when processing flame retardants in powder form, the risk of inhalation is higher than with liquid or granulated variants, which requires stricter protective measures.

Selecting the appropriate flame retardant requires comparing the technical parameters of different types, such as decomposition temperature, efficiency at various concentrations, or compatibility with polymer matrices. For example, phosphorus-based flame retardants are often preferred for their low environmental impact and good synergy with other additives, while inorganic hydroxides (e.g., aluminum hydroxide) are cost-effective and effective at lower temperatures. In addition to technical properties, legislative restrictions, such as REACH regulations or requirements for halogen-free materials in electronics, must also be considered. The final decision should be based on a balanced assessment of efficiency, safety, and costs, and it is advisable to consult the results with fire safety and chemical legislation experts.

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Classification of flame retardants according to CLP and its impact on safety measures

The classification of flame retardants according to the CLP Regulation (Classification, Labelling and Packaging) is a crucial step in ensuring fire safety in industrial applications. CLP sets criteria for assigning substances to hazard categories, such as flammability, toxicity during combustion, or the release of hazardous by-products. For example, halogen-based flame retardants may be classified as substances that release toxic gases in a fire, which requires specific safety measures during storage and processing. In contrast, halogen-free alternatives, such as organophosphorus compounds or inorganic hydroxides, often exhibit lower toxicity, but their effectiveness depends on correct dosing and compatibility with the material.

For manufacturers and processors, it is essential to understand the symbols and standardized hazard statements (H-statements) on labels. For instance, the H-statement H226 ("Flammable liquid and vapour") or H315 ("Causes skin irritation") signals the need to use personal protective equipment and follow technological procedures that minimize the risk of ignition or exposure. Correct classification according to CLP also facilitates communication in the supply chain, as customers and end-users can immediately identify potential risks and adapt their operational conditions accordingly.

REACH Registration and Chemical Safety Assessment: What You Need to Know

Registration of substances under the REACH Regulation is mandatory for all flame retardants manufactured or imported into the EU in quantities exceeding 1 tonne per year. The process includes a detailed Chemical Safety Assessment (CSA), which must cover exposure scenarios for all identified uses. For flame retardants, it is particularly important to assess their behavior at high temperatures, including the potential release of toxic substances or corrosive by-products. Manufacturers must demonstrate that the substance does not pose an unreasonable risk to humans or the environment throughout its entire life cycle.

Registration also includes the preparation of a Chemical Safety Report (CSR), which serves as the basis for Safety Data Sheets (SDS). The CSR must contain detailed data on physico-chemical properties, toxicological and ecotoxicological profiles, and exposure scenarios. For flame retardants, it is critical to include data on their storage stability and compatibility with other materials to prevent unwanted reactions that could increase fire risk. Suppliers should provide customers with updated information in case of changes to registration data.

Practical Tools for Risk Minimisation: From Laboratory Tests to Operational Measures

Risk assessment for flame retardants begins as early as the product development phase. Standard test methods are used to evaluate flammability, flame spread rate, smoke generation, and the toxicity of combustion products. For example, tests according to standardised procedures for building materials or textiles allow the effectiveness of different types of flame retardants to be compared and the optimal solution for a specific application to be selected. However, laboratory results must also be verified under real-world conditions, as the behaviour of substances can be influenced by synergistic effects with other material components.

Under operational conditions, it is crucial to follow technological procedures that minimise the risk of ignition or exposure. This includes controlling processing temperatures, ensuring adequate ventilation, and using closed systems for handling powdered or liquid flame retardants. For storage, it is recommended to keep them separate from flammable materials and to regularly inspect packaging to prevent leaks. Training employees on the proper handling of substances and fire procedures is just as important as technical measures. Documentation of all these steps then serves as proof of compliance with legislative requirements and may be requested during inspections by regulatory authorities.

Need help with selection and documentation?

Every flame retardant requires a specific approach to risk assessment and safety documentation. GCG Group provides detailed Safety Data Sheets (SDS) and technical specifications for every supplied raw material to help you meet legislative requirements and ensure safe processing in your production. Contact us – or browse our catalog of over 1,300 products right away.