Shipping Terms Glossary

UN Number

A UN Number is a four-digit number that identifies dangerous or hazardous substances and goods.

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What is the UN Number?

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A United Nations (UN) Number is a four-digit number that identifies dangerous or hazardous substances and goods (e.g. explosives, flammable items, or poisonous substances)

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Here's an example of a UN Number:

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Lithium Battery Label Corrosives Paint
lithium battery un number Corrosives UN Number Paint UN Number

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Download free template
Battery Products UN Label

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What is the purpose of a UN Number?

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Besides identifying dangerous goods, UN numbers help you find the following:


• The correct proper shipping name

• The appropriate packaging that should be used for transportation

• The modes of transport the goods are eligible to be shipped by

• How much may be transported per package

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and other specific rules that apply to transporting the goods via a specific mode of transport.


The numbers range from UN0004 to about UN3600.

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The numbers range from UN0004 to about UN3600.

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UN Number Label Structure:

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What is UN Number Label Structure

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The labels have 3 parts:

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1. A symbol which indicates the hazardous class

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2. The UN Number

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3. The Hazardous Class Number

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Which products need a UN Number?

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You will require a UN number if you’re shipping dangerous goods, meaning goods with a hazardous component (e.g. certain types of batteries or flammable liquids).

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‍Here are some examples of goods requiring UN Number: ‍

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Lithium Battery Label Corrosives Paint
lithium battery un number Corrosives UN Number Paint UN Number

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How do you find a UN Number?


You can access the list of UN Numbers in the United Nations Dangerous Goods List.

Just type in the hazardous good’s name and hit search!

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Where should you put the UN Number?


It must be stated under the “Hazards Identification” section of the Material Safety Data Sheet (MSDS) of your good.

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Bookairfreight MSDS example with UN number highlighted


Daisy Jiang

Proud Co-Founder and CEO of Bookairfreight. Shortly after starting to work in the world of logistics, I was astonished at how difficult and time consuming it was for businesses to get their hands on a simple air freight quote. I saw this as an opportunity to really make a difference in people’s lives, and felt like I had to do something. It was the spark that lit the fire of Bookairfreight’s creation.

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