UN 1845 corresponds to which substance?

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Multiple Choice

UN 1845 corresponds to which substance?

Explanation:
UN numbers identify specific hazardous materials for transport. The number 1845 is assigned to dry ice, which is solid carbon dioxide. Dry ice behaves differently from gases like oxygen or helium, since it stays solid under typical shipping conditions and cools items by sublimating directly into CO2 gas. That gas can accumulate and displace oxygen in enclosed spaces, so dry ice requires appropriate labeling and handling, especially in confined areas. So, the substance corresponding to UN 1845 is dry ice.

UN numbers identify specific hazardous materials for transport. The number 1845 is assigned to dry ice, which is solid carbon dioxide. Dry ice behaves differently from gases like oxygen or helium, since it stays solid under typical shipping conditions and cools items by sublimating directly into CO2 gas. That gas can accumulate and displace oxygen in enclosed spaces, so dry ice requires appropriate labeling and handling, especially in confined areas. So, the substance corresponding to UN 1845 is dry ice.

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