REACH and CLP in Construction Chemistry: How to Correctly Read and Apply Safety Data Sheets for Raw Materials

Photo: RONNAKORN TRIRAGANON / Unsplash

Construction chemistry is one of the most regulated segments of the chemical industry. Every raw material, whether it is waterproofing additives, mortar modifiers, or concrete admixtures, must meet strict safety and health protection requirements. The foundation for proper handling is the Safety Data Sheet (SDS), which contains information on the classification of the substance under the CLP Regulation, exposure scenarios under REACH, and instructions for safe use. However, manufacturers and processors may find it challenging to navigate these documents—especially when working with dozens of different raw materials. This article explains how to efficiently read and apply key information from SDS to ensure compliance with legislation and workplace safety.

REACH and CLP: The Fundamental Framework for Construction Chemistry

The REACH Regulation (Registration, Evaluation, Authorisation and Restriction of Chemicals) and CLP Regulation (Classification, Labelling and Packaging) form the fundamental legislative pillars for handling chemical substances in the European Union, including raw materials used in construction chemicals. REACH focuses on the registration, evaluation, and potential restriction of chemical substances, while CLP sets out the rules for their classification, labelling, and packaging according to the GHS (Globally Harmonised System). For manufacturers and distributors of construction chemicals, this means an obligation to ensure that all raw materials comply with the requirements of both regulations before being placed on the market.

In practice, this means that every substance or mixture must be properly registered under REACH (if manufactured or imported in quantities exceeding 1 tonne per year) and simultaneously classified under CLP. This includes assessing hazardous properties such as toxicity, flammability, or ecotoxicity, followed by labelling packages with warning symbols and standardised hazard statements (H-phrases) and safety instructions (P-phrases). For construction chemicals, substances with corrosive, irritant, or sensitising effects, which are commonly found in adhesives, coatings, or waterproofing materials, are particularly relevant.

Safety Data Sheet (SDS): A Key Document for Working with Raw Materials

The Safety Data Sheet (SDS) is a fundamental document providing comprehensive information about a chemical substance or mixture. Its structure and content are defined by the REACH Regulation and must be supplied with every hazardous raw material. The SDS contains 16 mandatory sections covering everything from substance identification and hazards to first aid instructions and disposal information. For professionals in the construction chemicals industry, the SDS is an indispensable tool for risk assessment and planning safe handling.

Special attention should be paid to sections 2 (hazard identification), 8 (exposure limits and protective measures), and 14 (transport information). For example, in the case of epoxy resins or polyurethane adhesives, it is critical to know the exposure limits for inhalation and dermal exposure to select appropriate personal protective equipment (PPE). The SDS also provides physico-chemical properties, such as flash point or solubility, which are important for storage and handling. Always verify that the SDS is up to date – its validity is typically limited to 3–5 years, but it may be updated earlier if the classification changes or new scientific findings emerge.

Photo: RONNAKORN TRIRAGANON / Unsplash

How to Correctly Interpret Information in SDS for Construction Applications

Reading and interpreting a safety data sheet requires a systematic approach. Start with Section 1 (identification of the substance/mixture and of the company), where you will find basic information about the manufacturer and emergency contact details. Sections 2 and 3 then provide an overview of hazard classification and the composition of the mixture. For construction chemicals, it is important to check whether the substance contains sensitizers (e.g., isocyanates in polyurethane systems) or substances with acute toxicity (e.g., certain additives in coatings).

In Section 7 (handling and storage), you will find specific recommendations for safe handling, such as storage temperature limits or ventilation requirements. For example, solvents often have a maximum storage temperature limit (e.g., 30 °C) and a requirement for separate storage away from oxidizing agents. Section 8 then specifies exposure limits (e.g., PEL – permissible exposure limit) and recommended PPE, such as chemical-resistant gloves (e.g., nitrile) or respirators with an appropriate filter. For construction applications, Section 10 (stability and reactivity) is also crucial, as it highlights potential hazardous reactions, for instance, with water or acids.

Practical recommendations for buyers and technicians: How to verify raw material compliance with legislation

For buyers and technicians in the construction chemicals sector, it is crucial to verify whether supplied raw materials comply with REACH and CLP requirements before purchasing them. The first step is to request the current safety data sheet from the supplier and check whether the substance is properly registered under REACH. This can be verified in the ECHA (European Chemicals Agency) database, where all registered substances are published. It is also necessary to ensure that the classification in the SDS matches the labelling on the packaging – the warning symbols, H-phrases, and P-phrases must be consistent.

When selecting raw materials, it is advisable to prioritize substances with lower risk, such as those classified as "non-classified" or with less stringent H-statements. For mixtures, it is important to monitor whether all components comply with REACH, especially if they involve substances on the Candidate List (SVHC – substances of very high concern). For construction chemicals, requirements regarding VOCs (volatile organic compounds), which may be restricted by national regulations, are also relevant. Always consult the SDS with a workplace safety or chemical legislation expert to avoid risks associated with improper use of raw materials.

Photo: Ana Lucia Videira / Unsplash

REACH registration and its impact on raw material availability in construction chemicals

The REACH Regulation (Registration, Evaluation, Authorisation and Restriction of Chemicals) fundamentally affects the availability of chemical raw materials on the European market, including those used in construction chemicals. Manufacturers and importers must subject every substance registered in quantities exceeding one tonne per year to a comprehensive risk assessment, which includes physico-chemical properties, toxicity, and ecotoxicity. For construction chemicals, this means that some traditionally used substances may gradually be replaced by alternatives with a better safety profile. For example, certain types of phthalates or highly volatile solvents are no longer available to the same extent, forcing formulators to seek new formulations.

An important aspect is monitoring the so-called Candidate List of Substances of Very High Concern (SVHC). If raw materials contain more than 0.1% by weight of these substances, suppliers must inform customers and, in some cases, end-users. For buyers of construction chemicals, this means the need to regularly check updates to this list and require confirmation from suppliers regarding the absence of SVHC substances in the supplied raw materials. This requirement is often reflected in contractual terms and technical specifications.

Classification and Labelling under CLP: How to Read Labels of Raw Materials for Construction Chemicals

The CLP Regulation (Classification, Labelling and Packaging) harmonises the system for classifying and labelling chemical substances and mixtures in the EU according to the Globally Harmonised System (GHS). For construction chemicals, it is crucial to understand hazard pictograms, signal words ("Danger" or "Warning"), and standardised hazard statements (H-phrases) and safety instructions (P-phrases). For example, a flame pictogram indicates flammability, while a skull and crossbones warns of acute toxicity. This information directly influences the handling, storage, and application of raw materials on construction sites.

In practice, particular attention must be paid to the combination of H-statements on labels. For example, H226 ("Flammable liquid and vapour") combined with H315 ("Causes skin irritation") requires not only fire precautions but also protection for workers' skin. For construction chemicals, statements regarding chronic effects, such as H373 ("May cause damage to organs through prolonged or repeated exposure"), are also relevant. This information must be reflected in internal safety guidelines and employee training, particularly when working with epoxy resins, polyurethane foams, or silicate coatings.

Practical Tools for Verifying Raw Material Compliance: Databases and Certificates

Several useful tools and databases exist for verifying raw material compliance with REACH and CLP. The European Chemicals Agency (ECHA) provides a publicly accessible database of registered substances, where it is possible to check whether a specific substance is properly registered and what its classifications are. For construction chemicals, it is useful to focus on the "Use" section in registration documents, where specific applications, including construction, are often listed. Another resource is the classification and labelling database, which allows searching for H-statements and pictograms for individual substances.

In addition to public databases, it is advisable to request compliance certificates and declarations of conformity with REACH from suppliers. These documents should contain specific information on the substance's registration number, confirmation of the absence of SVHC substances, and classification according to CLP. For purchasers, it is important to verify whether the certificates cover all components of the mixture, not just the main active substance. In case of doubt, the services of accredited laboratories, which perform analyses for the presence of prohibited or restricted substances according to applicable regulations, can be used.

Unsure about safety documentation?

For every raw material in our portfolio, we provide complete safety data sheets and technical documentation in compliance with REACH and CLP. Our experts will advise you on interpreting the data and selecting appropriate protective measures for your specific application. Contact us – or browse our catalogue of over 1,300 products right away.