Intralogistics in the Chemical Industry: Safety, Compliance, and Traceability in the Material Flow

Hazardous materials, storage classes, legal requirements, and a variety of containers make intralogistics in the chemical industry a challenging task. It is crucial not only to move materials efficiently but also to manage every storage and transport process safely, traceably, and in compliance with regulations. Digital systems provide the necessary transparency for this.

The chemical industry places special demands on internal material flows. Raw materials, intermediate products, finished goods, and auxiliary materials must be available at the right place at the right time. At the same time, strict requirements apply to the storage, labeling, handling, and documentation of many chemical substances. Even a single instance of incorrect storage, a withdrawal resulting from mix-ups, or inadequate batch documentation can have far-reaching consequences. Intralogistics therefore plays a key role in this environment. It integrates goods receipt, warehousing, production supply, internal transport, and shipping into a seamless process. This involves far more than the mere movement of goods: material flows must be organized in such a way that safety requirements are met, legal regulations are observed, and inventory can be reliably identified at all times.

With increasing product diversity, smaller batch sizes, and rising documentation requirements, the importance of systematic control is growing. The central question is: How can safety, compliance, and traceability be reconciled with an economical and efficient material flow?

Chemical production and storage sites vary considerably in terms of their processes and products. While some companies primarily process powdered raw materials in bags or big bags, others handle liquids in drums, canisters, IBC containers, or tank systems. Added to this are gaseous substances, temperature-sensitive products, and materials that have specific requirements regarding humidity, light, or environmental conditions. This diversity has a direct impact on internal logistics. Different types of containers require different storage locations, modes of transport, and handling techniques. At the same time, the specific properties of the materials must be taken into account during storage and transport.

Another challenge lies in the close integration of logistics and production. A shortage of raw materials can interrupt production processes. Incorrectly provided materials can lead to defective batches. If products are mixed up or not clearly identified, this can, in the worst-case scenario, pose hazards to employees, equipment, and the environment.

Intralogistics must therefore pursue several objectives simultaneously:

• Operational Safety: Hazardous materials must be stored and handled in accordance with their properties.
• Process Safety: Materials must be clearly identified and provided for the correct process.
• Compliance: Legal and operational requirements must be taken into account in the processes.
• Traceability: Origin, batch, storage location, and material movements must be traceable.
• Cost-effectiveness: Storage space, transport routes, and inventory should be utilized as efficiently as possible.

These objectives are not fundamentally at odds with one another. However, this requires that safety requirements not be integrated into existing processes only after the fact, but rather be taken into account from the very beginning when designing and managing material flows.

Handling hazardous substances is one of the most defining characteristics of chemical intralogistics. Depending on the substance, there may be, for example, fire and explosion hazards, health risks, corrosive properties, or environmental hazards. This results in different requirements for storage, transport, and operational safety measures. In Germany, the Hazardous Substances Ordinance and the Technical Rules for Hazardous Substances (TRGS) provide an important regulatory framework. TRGS 510 is particularly relevant for the storage of hazardous substances in portable containers. It specifies requirements for safe storage and addresses, among other things, protective measures, special fire safety requirements, and the co-storage of different substances. Which requirements apply in a specific case depends on the substance, the quantity, the storage method, and the operational conditions.

For operational intralogistics, this means: A storage location must not be assigned simply because it is available and fits the respective container. Rather, it must be verified whether the storage area is suitable for the material and meets the necessary protective measures.

These include, for example:

• consideration of substance properties and storage requirements,
• compliance with prescribed or internally established rules for segregation and co-storage,
• the use of suitable transport and storage equipment,
• compliance with weight limits and stacking regulations,
• the safe handling of damaged or leaking containers,
• the clear labeling and identification of stored materials.

Special attention must be paid to the co-storage of substances that are incompatible with one another. If certain chemicals come into contact with one another in the event of a leak, dangerous reactions can occur. Physical separation, appropriate containment measures, and designated storage areas are therefore essential components of a safe storage plan. The actual hazard must not be determined solely based on a general product description. The specific substance information and the resulting requirements are decisive. The storage organization must translate this information into actionable rules.

Storage classes help systematically classify hazardous substances based on their properties and the relevant storage requirements. In practice, they form an important foundation for the structured organization of hazardous substance storage facilities. However, storage classes should not be equated with the hazardous substance classes used for labeling under the CLP Regulation. While the CLP classification describes the hazardous properties of a substance or mixture, storage classes serve to systematically classify substances in the context of storage. Therefore, a complete storage decision cannot be readily derived from a hazard label alone.

For storage planning, the relevant information must be consolidated. This includes, for example, the substance’s classification, the prescribed storage conditions, permitted co-storage, and, where applicable, special requirements regarding temperature, ventilation, or fire protection.

In operational practice, the challenge can begin as early as master data maintenance. New products are created, suppliers change product information, or existing materials receive updated safety data sheets. If such changes are not incorporated into the warehouse organization, the stored rules may no longer align with actual requirements. A digital warehouse management system can assist here by linking material master data with storage restrictions. During putaway, the system can then verify whether a designated storage location is approved for the material in question. This prevents unauthorized placements or flags them for review.

However, the quality of this control depends on the data foundation. Incomplete material information, incorrectly maintained warehouse attributes, or outdated rules cannot be compensated for by software alone. Clearly defined responsibilities for master data maintenance and processes that reliably transfer changes to operational logistics are essential.

Compliance with legal requirements is not an isolated administrative task in the chemical industry. It influences warehouse design, workflows, employee qualifications, and the technical systems used. In addition to the Hazardous Substances Ordinance and the relevant TRGS guidelines, other regulatory frameworks are relevant depending on the substance, activity, and operational structure. These include, for example, requirements under chemical legislation, fire and explosion protection regulations, and, where applicable, water law and facility-specific requirements. Which specific regulations apply must be determined for each individual site and application.

At the European level, the CLP Regulation establishes requirements for the classification, labeling, and packaging of substances and mixtures. The labeling provides information about hazards and necessary protective measures throughout the supply chain.

For intralogistics, it is crucial that such requirements are not merely documented in written procedures or work instructions; they must be integrated into the actual process. One example is the storage of a newly delivered substance. The goods are first identified and cross-referenced with existing order and material data. Subsequently, the relevant information must be available to determine whether storage is permissible. Only then should the substance be stored in a suitable area. Another example is the provision of a hazardous substance for production. Here, the material identity, quantity, batch, and, if applicable, other release criteria must match. Withdrawal must not depend solely on the physical availability of the container.

Software can support such verification steps and document them in a traceable manner. However, it does not replace either the hazard assessment or the technical evaluation of applicable regulations. Nor does an IT system relieve the operator of their responsibility for safe operational procedures. An effective compliance organization therefore combines three levels: binding rules, technology-supported processes, and trained employees.

Drums, canisters, bags, pallets, big bags, and IBC containers are part of the daily material flow in many chemical plants. However, the different types of containers each place their own demands on storage technology, transportation, and identification. A 200-liter drum is handled differently than a big bag. An IBC container requires a different storage area than a canister carton. Added to this are potential limitations regarding stackability, load capacity, packaging condition, and mode of transport.

In addition to physical handling, unambiguous identification is crucial. The product name alone is often insufficient for this purpose. Especially in the case of similar substances, different concentrations, or different batches, it must be clear exactly which specific material is contained in which container. Barcode- or RFID-based identification methods can support tracking and assignment. It is crucial that the identity is not only recorded upon receipt of goods but is maintained throughout the entire internal movement of the material.

For example, a container is delivered, inspected, stored, reserved for a production order, and finally transported to a staging area. At each of these steps, the association between the material, the container, and the storage location must be correct. This becomes particularly relevant for partial quantities and opened containers. If a material container is opened to use only a portion of its contents, it must remain traceable exactly how much remains and what the container’s status is. Depending on the process, additional information regarding reusability, the condition of the seal, or required inspections may be necessary.

End-to-end digital identification reduces manual inquiries and supports secure processing. However, this requires that transactions be recorded in a timely manner and that physical movements actually match the documented processes.

Batch traceability is an essential component of quality assurance and process control in the chemical industry. It enables companies to track material movements and production relationships and to respond specifically to any deviations. A batch can be tracked across multiple process steps: from the delivery of a raw material through its storage and withdrawal to its use in a production order. Depending on the manufacturing process, additional information may be included, such as the assignment to a production batch, a blend batch, or a finished product.

These links are particularly important when quality issues arise. If a raw material must be subsequently blocked, it should be possible to determine which stocks are still available and in which production orders the material has already been incorporated. Conversely, if a finished product is rejected, it may be relevant to know which raw material batches were used in its manufacture.

Seamless traceability requires that the relevant information be systematically recorded. Depending on the requirements, this includes:

• Material number and batch identifier
• Supplier and goods receipt reference
• Quantity and storage location
• Status (for example: released, blocked, or under review)
• Withdrawals and stock transfers
• Allocation to production orders and subsequent batches
• Shipping and delivery information

The specific implementation depends on the products, operational processes, and applicable requirements.

It is important to distinguish between an inventory overview and actual traceability. Knowing that 500 kilograms of a raw material are in the warehouse does not answer the question of which batches make up this quantity or in which production orders individual sub-quantities were used.

Only by linking movement data with batch information can the necessary transparency be achieved. A warehouse management system can provide the logistical foundation for this, while higher-level production or ERP systems provide additional information on the manufacturing process and quality assurance.

The more complex the requirements for hazardous material storage, containers, and batches become, the more difficult it is to maintain consistency in all information using only manual entries, lists, and local work instructions. Specialized warehouse management software, often referred to as a Warehouse Management System (WMS), can systematically map operational warehouse processes. It manages inventory and storage locations, supports putaways and pickups, and documents relevant material movements. In the chemical industry, it is particularly important that not only quantities and locations but also substance- and batch-specific characteristics are taken into account.

A powerful system can, for example:

• Verify storage locations based on defined properties and restrictions
• Support appropriate putaway and picking strategies
• Unambiguously manage batches, containers, and remaining quantities
• Take blocked inventory and release statuses into account
• Coordinate replenishment and production supply
• Log material movements in a traceable manner
• Identify discrepancies and invalid postings

The real challenge lies in integrating these functions into the existing system landscape. In many chemical plants, ERP systems, production planning, laboratory or quality management, warehouse technology, and transport control are interconnected. To ensure that information is consistently available, interfaces and responsibilities must be clearly defined. For example, the ERP system can issue a production order, while the WMS identifies the required raw materials and batches in the warehouse and controls their withdrawal. Feedback on the actual movement of materials, in turn, provides a basis for further inventory and production documentation.

However, not every piece of information necessarily needs to be maintained in duplicate in every system. It makes more sense to clearly define which system is the primary source for which data and how changes are propagated.

Automation can also support material flow control. Conveyor systems, automated warehouse and staging systems, or automated guided vehicles can handle internal movements. In the chemical industry, however, such solutions must be adapted to the respective material properties, safety concepts, and operating conditions. Automation is therefore not automatically synonymous with greater safety. It is crucial that technical equipment, software, and operational safety measures be viewed as an integrated system.

An important task of digital intralogistics is to combine safety requirements with operational efficiency. Additional checks and documentation steps are necessary but must not lead to confusing workflows. A well-designed process therefore clearly defines what information is needed and when, which decisions can be made automatically, and in which cases expert approval is required.

For example, not every putaway must follow the same audit trail. For known materials with complete master data and clearly defined storage rules, a standardized procedure can be established. In contrast, when information is incomplete, containers are damaged, or material information is contradictory, the process should trigger a targeted clarification. Such exceptions must be visible and must not disappear from the system due to improvised workarounds.

Equally important is practical user guidance. Warehouse employees need information relevant to the specific work step. A clear display of the storage location, material identity, batch, and—where applicable—necessary warnings or inspection notes supports safe execution. At the same time, access permissions and logging should be designed so that sensitive actions remain traceable. These may include, for example, inventory adjustments, batch locks, or changes to safety-related master data.

In this context, transparency does not mean collecting as much data as possible. It means providing the right information at the right time and making decisions within the process traceable.

Despite existing IT systems, similar challenges arise time and again in chemical intralogistics. Often, these are not caused by individual technical errors, but by gaps between data maintenance, work organization, and actual material movements.

Incomplete master data: If warehouse attributes, container information, or substance properties are missing, the system cannot support reliable warehouse decisions. Structured data accountability and regulated change management processes are therefore essential.

Delayed entries: If a container is physically moved without the transaction being documented in a timely manner, the system inventory and the actual inventory will differ. Mobile data entry directly at the storage location can help reduce such discrepancies.

Unclear batch assignments: When partial quantities are withdrawn or containers are decanted, the relevant assignments must be maintained. Otherwise, gaps in traceability will arise.

Manual workarounds: If blocked materials, missing information, or unresolved storage restrictions are regularly handled outside the intended process, the reliability of digital control is compromised. Exceptions should therefore be defined, justified, and documented.

Inadequate Interfaces: When warehouse management, production, and quality assurance use different data sets, this leads to unnecessary follow-up inquiries and risks in material provision. Clear data responsibilities and coordinated interfaces can remedy this situation.

A sensible approach to improvement begins with an analysis of actual workflows. What information is needed at each stage of the process? Where do manual corrections occur? Which errors recur? And which requirements can be addressed through organizational measures before additional technology is introduced? Based on this analysis, companies can make targeted decisions about which processes should be standardized, digitized, or automated.

Intralogistics in the chemical industry operates at the intersection of stringent safety requirements, complex material structures, and cost-effective operations. Hazardous substances must be stored appropriately, containers handled correctly, batches reliably tracked, and legal requirements translated into concrete processes.

These requirements cannot be met by a single software function or an isolated automation measure. They require a coordinated interplay of robust master data, clear responsibilities, suitable warehouse technology, qualified employees, and end-to-end process control. Digital systems can make a significant contribution here. They provide transparency regarding inventory levels and material movements, support compliance with defined warehouse rules, and facilitate traceability from goods receipt to the finished product. At the same time, they make deviations more easily identifiable and provide a solid foundation for the continuous improvement of processes. For chemical companies, the key added value therefore lies not only in faster storage and retrieval. Above all, it lies in reliably managing material flows and making decisions based on consistent information.

High-performance intralogistics combines safety, compliance, and efficiency into a seamless process. The more consistently material properties, storage requirements, and batch information are integrated into operational control, the better risks can be mitigated, production processes secured, and logistics operations organized cost-effectively. In the chemical industry in particular, this is a key prerequisite for a material flow that not only functions but also remains traceable and resilient.

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