In the UN packaging code, which element indicates the material of packaging?

• A. A number indicating packaging
• B. A package category number
• C. A symbol for hazard
• D. A capital letter indicating material of packaging

Answer: (D)

In the UN packaging code, different parts of the marking convey different pieces of information about the packaging, including what it’s made from. The material of the packaging is indicated by a capital letter. This single-letter cue keeps the material designation clear and separate from other details in the mark. The numbers in the code typically relate to packaging type or size, while a hazard symbol communicates danger associated with the contents rather than what the packaging is made of. There’s also a package category number that signals the required performance level of the packaging, which again is distinct from material. Knowing that a capital letter points to the material helps ensure the packaging chosen is compatible with the contents and meets regulatory and handling requirements.