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UN number
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==External links== * [http://www.unece.org/trans/danger/danger.html United Nations Committee of Experts on the Transport of Dangerous Goods] * [http://www.unece.org/trans/danger/publi/unrec/12_e.html UN Recommendations on the Transport of Dangerous Goods.] Part 2 defines the hazard classes and their divisions and Part 3 contains a complete list of all UN numbers and their hazard identifiers. * The [https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/ERG2016.pdf Emergency Response Guidebook] from the U.S. Department of Transportation contains a list of all assigned NA numbers along with recommended emergency procedures. {{Portal bar|Politics}} [[Category:Chemical numbering schemes]] [[Category:Lists of UN numbers| ]]
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