Single Packaging
Minimum Height of UN Numbers on Packages

Anatomy of a Box - UN Packaging

Update to UN Number Minimum Height

Are my eyes getting better with age or did something change? Something changed.

New to the regulations this year is a statement regarding the size of text on labels for dangerous goods. Both IATA (Air) and IMDG (Marine) have made changes to reflect the UN Model Regulation that become mandatory as of January 1st, 2014. Please reference “UN Model Regulations: 17th Edition; Section 5.2.1.1 (Vol 2. pg. 139)”, “IATA: 54th Edition; Section: 7.1.5.5 – Size (pg. 619)” and “IMDG Code: 2012 Edition; Section: 5.2.1.1 (Vol 1. pg. 244)” to find the following information.

As of January 1, 2014, mandatory size for “UN number” and letters “UN”:

UN Number Measurement

Some things to note:

  1. The way this is written is such that the UN number and letters “UN” MUST be at least the size specified above whereas other package markings SHOULD be that minimum size.
  2. Other package markings include the proper shipping name, technical name, the word “Overpack”, and any other markings.
  3. For IMDG, cylinders marked in accordance with the 2010 version of IMDG are acceptable until no later than July 1st, 2018 (and only if marked by December 31st, 2013), otherwise the sizing requirements must be followed.

New UN Number Measurements

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One thought on “Minimum Height of UN Numbers on Packages

  1. the us dot regulations have always required the size of lettering to be size appropriate to the size of the packaging – as someone who has been doing this for over 30 years – we need the bigger lettering so we can read the packages without our glasses – more important though it increases the safety and handling of packages

    Larry Snellings
    Dangerousgoods.com
    Houston Texas

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