UN Dangerous Goods Number (UNDG), commonly referred to as UN Number, is a unique identifier assigned to hazardous substances and articles in international transport.

Definition: A four-digit number assigned by the United Nations Committee of Experts on the Transport of Dangerous Goods.

Purpose: To standardize the identification of hazardous materials, ensuring consistency in labeling, handling, and emergency response procedures across international borders.

Usage:

Shipping and Transport: Included in shipping documents, labels, and placards to identify dangerous goods.

Safety and Compliance: Helps in adhering to regulations regarding the transportation, storage, and handling of hazardous materials.

Examples:

UN 1202: Diesel fuel

UN 1950: Aerosols, non-flammable

UN 3082: Environmentally hazardous substance, liquid, n.o.s. (not otherwise specified)

Importance:

Regulatory Compliance: Ensures adherence to international safety standards.

Emergency Response: Provides crucial information for