UN number
UN 1845 — Dry ice (carbon dioxide, solid)
Last updated: 6 Jul 2026Reviewed by Ms. Rubab Nizami, Lead AVSEC Faculty
In short
UN 1845 is the UN number for dry ice (carbon dioxide, solid), a dangerous good in Class 9. It is commonly coolant for perishable or medical items. For passengers: allowed up to 2.5kg per person with airline approval and proper packaging.
- Proper shipping name
- Dry ice (carbon dioxide, solid)
- Class
- 9
- Common use
- Coolant for perishable or medical items.
What is UN 1845?
UN 1845 identifies dry ice (carbon dioxide, solid) in international transport. It belongs to dangerous-goods Class 9, and is used for coolant for perishable or medical items.
Can passengers carry Dry ice (carbon dioxide, solid)?
Allowed up to 2.5kg per person with airline approval and proper packaging. Always follow your airline's dangerous-goods policy, since limits and approvals differ between carriers.