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# ADR UN Number Lookup

Search the complete ADR Table A dangerous goods list. Type a UN number or substance name and get the full record, from danger labels to tunnel restriction codes.

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## About ADR and UN numbers

**What is ADR?**ADR is the European agreement on the international carriage of dangerous goods by road. Table A lists every substance with its transport requirements.

**UN numbers**A four-digit number assigned by the United Nations that identifies a dangerous substance or article, like UN 1203 for petrol. It appears on the orange plate of every ADR transport.

**Tunnel restriction codes**Codes B through E on the record define which tunnel categories the load may pass through. E is the most restrictive; no code means no restriction.

**Packing groups**PG I means high danger, PG II medium, and PG III low. The packing group drives which packagings and quantity limits apply.

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