The designation of hazardous substances is an essential part of the safe handling of chemicals. It is a system used worldwide to communicate the risks and dangers of certain substances. These designations are based on international guidelines and are established by organizations such as the United Nations. The purpose of hazardous substance designation is to inform users, such as employees, consumers and emergency responders, about the possible dangers associated with the use or exposure to certain substances. This enables them to take appropriate measures to protect themselves and others. There are several elements that are part of the designation of hazardous substances. One of the most important elements is the use of icons. These pictograms are visual symbols that indicate the nature of the hazard, such as flammability, toxicity, corrosiveness and explosiveness. They are designed to be quickly recognizable and can be displayed on labels, packaging and safety data sheets. In addition to the pictograms, the indication of hazardous substances also includes the use of signal words. These words, such as "danger" or "warning", indicate the severity of the hazard. The signal word "danger" is used for substances with serious hazards, while the signal word "warning" is used for substances with less serious hazards. Furthermore, the indication of hazardous substances also includes the use of hazard statements and safety recommendations. Hazard statements are short sentences that provide specific information about the nature of the hazard, such as "may be fatal if swallowed" or "causes severe burns." Safety recommendations are instructions on how to handle the substance safely, such as "wear protective clothing" or "keep the substance out of the reach of children." It is important to understand and respect the labeling of hazardous substances to prevent accidents and injuries. By providing the correct information, users can take the necessary precautions and implement appropriate safety measures. This applies not only to employees who work with hazardous substances on a daily basis, but also to consumers who may encounter these substances in their daily lives, such as in household cleaning products. In short, hazardous substance designation is a crucial system that helps inform and protect users from the dangers of chemicals. By using the correct pictograms, signal words, hazard statements and safety recommendations, people can handle hazardous substances safely and minimize the risks.