10 Common Mistakes in Storing Chemical Raw Materials and How to Avoid Them
Improper storage of chemicals can lead to quality degradation, safety risks, or financial losses. What mistakes do companies most frequently make, and how can they be eliminated?
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Storing chemical raw materials requires a careful approach – from proper temperature and humidity to the separation of incompatible substances. Even a minor oversight can lead to material degradation, contamination, or even a safety incident. In this article, we focus on ten of the most common mistakes that recur in practice and provide advice on how to avoid them. Whether it involves surfactants, polyols, or coating additives, adhering to basic rules will extend the lifespan of raw materials and ensure smooth operations.
1. Inadequate identification and labeling of containers
The first and most common mistake is insufficient or missing labeling of chemical raw materials. According to the CLP Regulation, every container must be equipped with a clear label identifying the substance, hazard symbols (GHS pictograms), signal words (e.g., "Danger" or "Warning"), and standardized hazard statements (H-phrases) and safe handling instructions (P-phrases). Missing or illegible labels can lead to substance mix-ups, incorrect use, or even chemical reactions with serious consequences. In practice, we often encounter cases where containers are relabeled only with internal codes that are not understandable to all employees.
The solution is to implement a uniform labeling system that complies with current legislation and is understandable to all employees. It is recommended to use durable labels with lamination or protective film that resist moisture, chemicals, and mechanical damage. Regularly check the condition of labels and replace them immediately if damaged. For better clarity, color coding based on hazard classes can also be used, such as red for flammable substances or yellow for corrosives.
2. Inappropriate Storage Conditions and Temperature Fluctuations
Chemical raw materials are often sensitive to temperature, humidity, or light. Storage outside recommended conditions can lead to degradation, loss of efficacy, or even hazardous reactions. For example, some surfactants or polyols may crystallize at low temperatures, while other substances, such as peroxides, become unstable and risky at high temperatures. Humidity can cause hydrolysis or agglomeration, rendering the raw material unusable for further applications.
To minimize risks, it is crucial to adhere to the temperature range specified in the Safety Data Sheet (SDS) and ensure stable storage conditions. Ideally, use air-conditioned or temperature-controlled spaces with humidity control. For light-sensitive substances (e.g., certain coating additives), use opaque or dark packaging. Regularly monitor storage conditions using data loggers and respond promptly if limits are exceeded. It is also important to separate storage areas for different categories of substances, such as flammables from oxidizing agents.
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3. Ignoring the FIFO principle and uncontrolled stock aging
The "First In, First Out" (FIFO) principle is a fundamental rule for effective inventory management, yet it is often overlooked in practice. Chemical raw materials have a limited shelf life, and their properties can change over time, even when stored correctly. For example, some polymers or resins may lose reactivity, while other substances, such as polymerization initiators, may degrade and become ineffective or hazardous. Storing new stock in front of older stock leads to raw materials losing quality or becoming unusable.
To implement FIFO, it is essential to clearly label each batch with the receipt date and expiration date. Storage areas should be organized so that older stock is easily accessible, and new deliveries are placed behind it. Regularly conduct inventory checks and monitor the condition of stock, especially for substances with a short shelf life. If the expiration date is exceeded, the raw material must be analyzed to determine whether it is still suitable for use or must be safely disposed of in accordance with applicable regulations.
4. Improper Handling and Insufficient Staff Training
Safe handling of chemical raw materials requires knowledge of their properties and potential risks. A common mistake is insufficient staff training, which leads to improper handling, such as mixing incompatible substances, using unsuitable tools, or failing to follow safety measures. For example, some surfactants may produce hydrogen upon contact with metals, increasing the risk of explosion, while other substances may cause exothermic reactions if incorrectly dosed.
Prevention is based on regular employee training in occupational safety, handling of chemical substances, and first aid. Training should include practical demonstrations of correct procedures, such as how to pour liquids, how to use personal protective equipment (PPE), or how to respond in the event of a spill. It is also important to ensure that all employees have access to up-to-date Safety Data Sheets (SDS) and know how to work with them. For more complex operations, such as handling highly reactive substances, it is advisable to introduce standardized operating procedures (SOPs) and practice them regularly.
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5. Mixing incompatible substances and the risk of chemical reactions
One of the most serious mistakes in storing chemical raw materials is their incorrect sorting and subsequent mixing of incompatible substances. Many industrial chemicals react aggressively when in contact with other groups of substances—for example, acids with alkalis, oxidizing agents with organic solvents, or flammable liquids with strong oxidizing agents. These reactions can lead to the release of toxic gases, explosions, or fires, which endanger not only the warehouse but also the health of employees.
Prevention involves strict adherence to compatibility tables and segregation of substances based on their chemical properties. The basic rule is: store acids separately from bases, flammable substances separately from oxidizing agents, and reactive chemicals separately from stable ones. It is also important to ensure that containers with hazardous substances are not stored above one another—in the event of a leak, contamination of other raw materials could occur. For greater safety, it is advisable to use separate storage areas or at least physical barriers, such as partitions or dedicated shelves with clear labeling.
6. Neglecting Regular Inspection of Packaging and Leaks
Even seemingly intact packaging can degrade over time, especially if exposed to unsuitable conditions such as high humidity, temperature fluctuations, or mechanical stress. Plastic canisters can become brittle, metal drums can corrode, and paper bags can tear. Neglecting regular inspection of packaging can lead to leaks, warehouse contamination, or even chemical reactions with other substances. This not only devalues the raw materials but also increases the risk of workplace accidents and environmental damage.
It is recommended to implement a system of regular inspections to verify the integrity of packaging, the tightness of closures, and any signs of corrosion or deformation. Inspections should be carried out at least once a month, and more frequently for highly reactive or toxic substances. If damage is detected, the contents must be immediately transferred to a new container, and the damaged packaging must be disposed of in accordance with applicable regulations. To facilitate monitoring, it is advisable to maintain records of inspections and document the condition of each container, including the date of the last inspection and any defects.
7. Underestimating Fire Safety and Insufficient Protection Against Ignition
Flammable chemical raw materials, such as solvents, alcohols, or certain surfactants, pose a significant fire risk if not stored in accordance with fire safety regulations. A common mistake is storing these substances near heat sources, electrical wiring, or in areas without adequate ventilation. Another issue is insufficient provision of fire-extinguishing equipment or its incorrect placement—such as fire extinguishers being out of reach or using an unsuitable type of extinguishing agent for the given fire class.
To minimize risk, it is essential to follow several basic rules: store flammable liquids in separate, well-ventilated areas at temperatures below 25 °C, far from sources of sparks or open flames. Electrical installations in these areas must be designed for explosive environments (ATEX). Furthermore, appropriate fire-extinguishing equipment, such as powder or CO₂ fire extinguishers, must be available, and employees should be regularly trained in their use. Lastly, it is important to have a fire safety plan and evacuation procedure in place, which should be regularly updated and practiced.
Proper Storage Starts with Expert Advice
Every chemical raw material has its specific storage requirements, which are detailed in the Safety Data Sheets (SDS) and technical specifications. GCG Group provides complete documentation for each product and advises on optimizing storage conditions to keep your raw materials stable and safe throughout their shelf life. Contact us – or browse our catalog of over 1,300 products right away.
