UN 3219Class 5.1 — Oxidising Substances & Organic PeroxidesPG IIVariant 1 of 2
NITRITES, INORGANIC, AQUEOUS SOLUTION, N.O.S.
- Packing Group
- II
- Medium danger
- Classification Code
- O1
- Tunnel Code
- (E) meaning →
- Code governing tunnel passage
- Transport Category
- 2
- For the 1,000-point rule (0 = highest restriction)
- Hazard ID No.
- 50
- Kemler code
- Limited Quantity
- 1 L
- Max per inner package for LQ relief
- Excepted Quantity
- E2
- 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
E2
Max 30 ml/g per inner, 500 ml/g per outer package (Chapter 3.5)
Tunnel Code
Governs which tunnel categories the load may pass
Special Provisions
SP 103, SP 274
May alter scope or limits — full text in ADR 2025 Chapter 3.3
Hazard Labels Required
Label 5.1
These labels must be displayed on packages and vehicle placards in accordance with ADR 2025.
Special Provisions
SP 103SP 274
Refer to ADR 2025 Chapter 3.3 for full text of each provision.
UN 3219Class 5.1 — Oxidising Substances & Organic PeroxidesPG IIIVariant 2 of 2
NITRITES, INORGANIC, AQUEOUS SOLUTION, N.O.S.
- Packing Group
- III
- Low danger
- Classification Code
- O1
- Tunnel Code
- (E) meaning →
- Code governing tunnel passage
- Transport Category
- 3
- For the 1,000-point rule (0 = highest restriction)
- Hazard ID No.
- 50
- Kemler code
- Limited Quantity
- 5 L
- Max per inner package for LQ relief
- Excepted Quantity
- E1
- EQ code for excepted quantity relief
Thresholds — why, not just the verdict
Transport Category
Category 3
×1 points per kg/L — up to 1,000 kg/L of this substance alone stays under the 1,000-point threshold
Per-substance max
1,000 kg/L
Per-substance maximum for 1.1.3.6 relief (1.1.3.6.3)
Limited Quantity
5 L
Max per inner packaging for LQ relief (Chapter 3.4)
Excepted Quantity
E1
Max 30 ml/g per inner, 1,000 ml/g per outer package (Chapter 3.5)
Tunnel Code
Governs which tunnel categories the load may pass
Special Provisions
SP 103, SP 274
May alter scope or limits — full text in ADR 2025 Chapter 3.3
Hazard Labels Required
Label 5.1
These labels must be displayed on packages and vehicle placards in accordance with ADR 2025.
Special Provisions
SP 103SP 274
Refer to ADR 2025 Chapter 3.3 for full text of each provision.