UN 1040 has 2 classification variants in ADR 2025 — different hazard divisions or descriptions for the same UN number. Each variant may have different transport requirements.
- Packing Group
- N/A
- Not applicable
- Classification Code
- 2TF
- Tunnel Code
- (B/D) meaning →
- Code governing tunnel passage
- Transport Category
- 1
- For the 1,000-point rule (0 = highest restriction)
- Hazard ID No.
- 263
- 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
Special Provisions
SP 342
May alter scope or limits — full text in ADR 2025 Chapter 3.3
Hazard Labels Required
Label 2.3Label 2.1
These labels must be displayed on packages and vehicle placards in accordance with ADR 2025.
Special Provisions
SP 342
Refer to ADR 2025 Chapter 3.3 for full text of each provision.
UN 1040Class 2 — GasesVariant 2 of 2
ETHYLENE OXIDE WITH NITROGEN up to a total pressure of 1 MPa (10 bar) at 50 °C
- Packing Group
- N/A
- Not applicable
- Classification Code
- 2TF
- Tunnel Code
- (B/D) meaning →
- Code governing tunnel passage
- Transport Category
- 1
- For the 1,000-point rule (0 = highest restriction)
- Hazard ID No.
- 263
- 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
Special Provisions
SP 342
May alter scope or limits — full text in ADR 2025 Chapter 3.3
Hazard Labels Required
Label 2.3Label 2.1
These labels must be displayed on packages and vehicle placards in accordance with ADR 2025.
Special Provisions
SP 342
Refer to ADR 2025 Chapter 3.3 for full text of each provision.
Check if UN 1040 qualifies for 1.1.3.6 exemption
Calculate small load points and check exemption thresholds
📅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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