What information does a pictogram provide?
In the CLP Regulation, the pictogram combines a symbol with a standardized visual format to communicate specific hazards. Its presence on the label helps indicate that information and controls are needed before using the product. It does not replace an assessment of working conditions nor does it describe all circumstances in which harm may occur.
The red-bordered diamonds used by CLP should not be confused with workplace safety signs or transport labels. Each system has a specific purpose and set of rules. Within the company, it is advisable to train employees to recognize these symbols on actual packaging and to locate the information that allows them to translate the symbol into a concrete preventive action.
Symbols related to physical hazards
An exploding bomb is associated with certain categories of explosives and self-reactive substances or organic peroxides. A flame indicates different flammability categories and other combustion-related hazards. A flame within a circle identifies oxidizing properties, capable of promoting the combustion of other materials, even if they are not themselves fuels.
The gas cylinder symbol indicates pressurized gases in the corresponding categories. Interpreting this symbol requires knowledge of the contents and the container’s condition. These symbols guide the search for requirements regarding ignition sources, heat, pressure, storage, and handling. The specific symbol used depends on the product’s classification and instructions, not solely on recognizing the symbol.
Symbols related to health and corrosion
Corrosion, according to the applicable classification, indicates serious skin or eye damage and corrosiveness to metals. The skull and crossbones symbol denotes specific categories of acute toxicity. The exclamation mark may correspond to several categories of health effects, so it should not be interpreted simply as a product of little consequence.
The human silhouette with a mark on the chest is used for various classes of serious health hazards, including carcinogenicity, respiratory sensitization, and other effects specified by CLP. A single symbol does not indicate which of these effects applies to the product. To identify it, read the H indications and consult the full classification.
Environmental hazard and absence of symbol
The tree and fish symbol is used for certain categories of hazards to the aquatic environment. In the workplace, it helps to identify the need to control spills and waste, but the absence of this symbol does not authorize the disposal of a product by any means. Waste management requires its own specific instructions and regulations.
Not all hazards or categories are represented by a pictogram. There are also rules regarding the combination and order of elements on the label. Therefore, counting diamonds is not a method for ranking products from least to most safe, and packaging without pictograms does not equate to a favorable rating for all uses.
How to read the full label
The reading process begins by identifying the product and verifying that it matches the intended use. Next, pictograms, warning words, hazard statements, precautionary advice, and supplementary information are reviewed. The words “Danger” and “Warning” have a regulatory function; they should not be replaced by informal interpretations such as “strong” or “soft.”
The safety data sheet provides further information on handling, storage, exposure, and emergencies. It must correspond to the product supplied and be available to those who need it. If the label is illegible or the identity is uncertain, use must be stopped and the identification resolved according to the established procedure.
Practical example
Two cleaners display the corrosion symbol, but they are used for different tasks and their data sheets indicate different incompatibilities. The company cannot conclude that they are interchangeable or that they require exactly the same storage conditions. Verify identity, relevant composition, instructions, equipment material, and application conditions before approving any changes.
The training uses both containers and asks participants to identify the precautions related to transferring and cleaning the product. The expected outcome is not to memorize the names of nine diagrams, but to be able to explain why the product should not be mixed, where it should be stored, and what to do if an unlabeled container is found.
Application in the workplace
Labeling information must be translated into understandable instructions and readily available resources. If exposure should be avoided, the company needs to specify how it is controlled in that operation: process design, extraction, work method, and residual protection. Simply posting a table of pictograms on a distant wall is insufficient.
During transfers, hazard identification and communication must be maintained in accordance with applicable requirements. Containers that could be mistaken for food or beverages must be avoided, and procedures for labeling internal containers must be established. Incompatibilities must be verified using technical information; a symbol scheme alone does not replace this verification.
Common mistakes and follow-up
Common mistakes include interpreting an exclamation mark as meaning it’s harmless, associating a symbol with only one disease, and using the number of pictograms as a risk score. It’s also a mistake to keep old posters as the sole reference when products or classification rules change.
Purchasing and receiving inspections must verify that the information is legible and consistent with the supply. Training is updated when products change and comprehension is verified through practical exercises. The pictogram fulfills its function when it leads to correct reading and safe action, not when it becomes merely a decorative element on the packaging.
