(UN Number, NA Number, DOT Number)
A four digit number representing a particular chemical or group of chemicals. These numbers are assigned by the United Nations (UN Numbers), the U.S. Department of Transportation (NA Numbers), or Transport Canada (NA Numbers). These numbers are commonly used throughout the world to aid in the quick identification of the materials contained within bulk containers (such as rail cars, semi-trailers and intermodal containers).
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Kenneth Barbalace. Chemistry & Environmental Dictionary - UN/NA Number. EnvironmentalChemistry.com. 1995 - 2024. Accessed on-line: 12/21/2024
https://EnvironmentalChemistry.com/yogi/chemistry/dictionary/U02.html
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<a href="https://EnvironmentalChemistry.com/yogi/chemistry/dictionary/U02.html">echo Chemistry & Environmental Dictionary (EnvironmentalChemistry.com)</a>- 'Contains definitions for most chemistry, environmental and other technical terms used on EnvironmentalChemistry.com as well as many other chemistry and environmental terms.
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