We'd like to use analytics cookies to understand which symbols people look up, so we know what to research next. They are not used for advertising and we set none of them unless you say yes. What we store.
A four-figure substance number on a plate or placard.
Also known as: UN substance number, Four figure UN code
In dangerous-goods transport the UN number is a four-figure code identifying the substance carried, shown on the lower division of an orange plate or beside a placard.
Identifies the substance being carried by a four-figure international code.
Contexts: Packaging
Is the same number the catalogue's existing UN number record describes; this record covers its display on a transport unit rather than the numbering scheme itself.
Contexts: Packaging
A group of four numerals printed in the lower division of an orange plate or on a panel adjacent to a class placard.