UN 1796 has 2 classification variants in ADR 2025 — different hazard divisions or descriptions for the same UN number. Each variant may have different transport requirements.
UN 1796Class 8 — Corrosive SubstancesPG IVariant 1 of 2
NITRATING ACID MIXTURE with more than 50 % nitric acid
- Packing Group
- I
- High danger
- Classification Code
- CO1
- Tunnel Code
- (E) meaning →
- Code governing tunnel passage
- Transport Category
- 1
- For the 1,000-point rule (0 = highest restriction)
- Hazard ID No.
- 885
- Kemler code
- Limited Quantity
- 0
- Max per inner package for LQ relief
- Excepted Quantity
- E0
- EQ code for excepted quantity relief
Thresholds — why, not just the verdict
Transport Category
Category 1
×50 points per kg/L — up to 20 kg/L of this substance alone stays under the 1,000-point threshold
Per-substance max
20 kg/L
Per-substance maximum for 1.1.3.6 relief (1.1.3.6.3)
Limited Quantity
Not permitted
No limited-quantity relief for this entry (Chapter 3.4)
Excepted Quantity
E0
No excepted-quantity relief for this entry (Chapter 3.5)
Tunnel Code
Governs which tunnel categories the load may pass
Hazard Labels Required
Label 8Label 5.1
These labels must be displayed on packages and vehicle placards in accordance with ADR 2025.
UN 1796Class 8 — Corrosive SubstancesPG IIVariant 2 of 2
NITRATING ACID MIXTURE with not more than 50 % nitric acid
- Packing Group
- II
- Medium danger
- Classification Code
- C1
- Tunnel Code
- (E) meaning →
- Code governing tunnel passage
- Transport Category
- 2
- For the 1,000-point rule (0 = highest restriction)
- Hazard ID No.
- 80
- Kemler code
- Limited Quantity
- 1 L
- Max per inner package for LQ relief
- Excepted Quantity
- E0
- EQ code for excepted quantity relief
Thresholds — why, not just the verdict
Transport Category
Category 2
×3 points per kg/L — up to 333 kg/L of this substance alone stays under the 1,000-point threshold
Per-substance max
333 kg/L
Per-substance maximum for 1.1.3.6 relief (1.1.3.6.3)
Limited Quantity
1 L
Max per inner packaging for LQ relief (Chapter 3.4)
Excepted Quantity
E0
No excepted-quantity relief for this entry (Chapter 3.5)
Tunnel Code
Governs which tunnel categories the load may pass
Hazard Labels Required
Label 8
These labels must be displayed on packages and vehicle placards in accordance with ADR 2025.
Check if UN 1796 qualifies for 1.1.3.6 exemption
Calculate small load points and check exemption thresholds
Other Corrosive Substances (Class 8)
📅Data: UNECE ADR 2025 (ECE/TRANS/352), via EU Directive 2008/68/EC. Last verified August 2026
ADR reference data only. Classification is the consignor's legal responsibility. Consult a DGSA for compliance decisions.
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