UN2031 — Nitric acid

Class 8

Quick facts: UN2031

What it is
Nitric acid other than red fuming, with at least 65 percent, but not more than 70 percent nitric acid
Hazard class
8 (subsidiary 5.1)
Packing group
II
Label
Class 8 - Corrosive · Division 5.1 - Oxidizer
Packaging (49 CFR 173)
Exceptions §173.154 · Non-bulk §173.158 · Bulk §173.242
Air limit per package
Passenger aircraft: Forbidden · Cargo aircraft: 30 L
Special provisions
B2, B47, B53, IB2, IP15, T8, TP2

Source: 49 CFR 172.101 Hazardous Materials Table — UN2031 (2025-01-01)

UN Number
UN2031
Hazard Class
8 (sub-risk 5.1)
Packing Group
II

Hazard Labels / Marks

  • Class 8 - Corrosive
  • Division 5.1 - Oxidizer

Source: 49 CFR §172.101 Hazardous Materials Table · 49 CFR §172.101 (2025-01-01)

Reference data transcribed from the published Dangerous Goods List. It is not legal advice and may not capture entry-specific exceptions, special provisions or packing-group ranges. Always verify against the current regulation edition for a specific shipment.

This is the reference entry for UN2031.

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