The UN number is a standardized four-digit identifier for hazardous substances and articles, established by the UN Committee of Experts on the Transport of Dangerous Goods. Its primary function is to ensure consistent hazard communication globally, facilitating safe handling and transport across various modes like sea, air, road, and rail.
Each UN number corresponds to a specific substance or group of substances with similar risks, complete with assigned hazard classes, packing groups, and proper shipping names. This system is fundamental to international transport regulations, including the IMDG Code, IATA DGR, ADR, and RID, ensuring that emergency responders and logistics personnel can quickly understand the nature of a hazard.
While the number itself is concise, its application mandates adherence to complex packaging, labeling, placarding, and documentation requirements. The system is vital for global commerce, enabling the safe movement of dangerous goods by providing a universally understood language of risk.
