UN 2426

AMMONIUM NITRATE, LIQUID (hot concentrated solution)

UN 2426 — ADR 2025 Table A: class 5.1, classification code O1, packing group —, labels 5.1, special provisions 252, limited quantity 0, excepted quantity E0, packing instructions —, transport category 0, tunnel restriction code (E), hazard identification number 59.

UNECE ADR 2025, ECE/TRANS/352 · checked 2026-10-28

Table A — ADR 2025 (ECE/TRANS/352), UN 2426
(1) UN No.2426
(2) Name and descriptionAMMONIUM NITRATE, LIQUID (hot concentrated solution)
(3a) Class5.1
(3b) Classification codeO1
(4) Packing group—
(5) Labels5.1
(6) Special provisions252
(7a) Limited quantities0
(7b) Excepted quantitiesE0
(8) Packaging: packing instructions—
(9a) Packaging: special packing provisions—
(9b) Packaging: mixed packing provisions—
(10) Portable tanks and bulk containers: instructionsT7
(11) Portable tanks and bulk containers: special provisionsTP1 TP16 TP17
(12) ADR tank: tank codeL4BV(+)
(13) ADR tank: special provisionsTU3 TU12 TU29 TC3 TE9 TE10 TA1
(14) Vehicle for tank carriageAT
(15) Transport category (Tunnel restriction code)0 (E)
(16) Special provisions for carriage: packages—
(17) Special provisions for carriage: bulk—
(18) Special provisions for carriage: loading, unloading and handling—
(19) Special provisions for carriage: operationS23
(20) Hazard identification No.59

ADR 2027 (accepted) — no change for UN 2426

ADR 2027 was accepted: depositary notification C.N.395.2026 (9 October 2026) records no objection to the amendments proposed by C.N.252.2026. It applies from 1 January 2027, and ADR 2025 may still be applied until 30 June 2027 (1.6.1.1). (C.N.395.2026)

ADR 2027: no Table A change for this entry (checked against ECE/TRANS/WP.15/274, Add.1 and Corr.1). Other parts of ADR 2027 may still affect its carriage.

ADR 2025 remains the edition FreightUtils serves and the one that applies until ADR 2027 takes effect on 1 January 2027; after that, ADR 2025 may still be applied until 30 June 2027 (1.6.1.1).

All ADR 2027 Table A changes →Check a list of UN numbers →

In plain words

Tunnels
Tunnel code (E): in tanks, Prohibited in E; in other carriage, Prohibited in E. Every category except E. (ADR 8.6.4; from the ADR table itself)
Small-load exemption
Transport category 0: no 1.1.3.6 exemption applies (ADR 1.1.3.6.3; from the ADR table itself)
Labels
Labels: model 5.1 (Oxidizing substances) (ADR 5.2.2.2.2, label model No. 5.1; paraphrase, not yet reviewed)
Tanks
Portable tank instruction T7: Portable tank, Class 1 and 3–9: test 4 bar; shell See 6.7.2.4.2; relief Normal; bottom openings See 6.7.2.6.3. Portable tank provision TP1: Portable tank must not be filled beyond the degree of filling set by 4.2.1.9.2 (the 97-based formula). Portable tank provision TP16: Tank must have an approved device against under- and over-pressure; relief per 6.7.2.8.3 to stop crystallization. Portable tank provision TP17: Thermal insulation of the tank may only use inorganic, non-combustible materials. Tank code L4BV(+): ADR tank code for Classes 1 and 3–9: liquid tank, 4 bar, openings B, valves/devices V, suffix (+). — L: tank for liquid-state substances (liquids, or solids handed over molten); 4: minimum calculation pressure of 4 bar (see 6.8.2.1.14); B: filling or discharge openings at the bottom, each with 3 closures; V: has a 6.8.2.2.6 breather device but no flame-propagation protection, or is not explosion-pressure-shock resistant; (+): alternative use of the tank for other substances is allowed only where the certificate of type approval says so (3.2.1 column (12); 4.3.4.1.3) Tank provision TU3: Shell interior and every part touching the substance kept clean; no lubricant that could react dangerously with it on pumps or valves. Tank provision TU12: When the tank changes use, shell and equipment must be thoroughly cleaned of residues before and after carrying this substance. Tank provision TU29: Tanks may be filled to no more than 97 % of capacity, and the temperature after filling must not exceed 140 °C. Tank provision TC3: Shells must be made of austenitic steel. Tank provision TE9: A top-mounted shut-off device must stop pressure build-up from decomposition, liquid leakage and entry of foreign matter. Tank provision TE10: Shut-off devices must not be blockable by solidified cargo; any insulation must be inorganic and free of combustible matter. Tank provision TA1: Tanks must not be approved for carrying organic substances. Vehicle for tank carriage: AT — Tank vehicle for dangerous goods that is not EX/III, FL or a MEMU: tanks over 1 m³ / 3 m³, or battery-vehicle over 1 m³. (ADR 4.2.5.2.6, portable tank instruction T7, 4.2.5.3, TP1, 4.2.5.3, TP16, 4.2.5.3, TP17, 4.3.4.1.1, tank code L4BV(+), 4.3.5, TU3, 4.3.5, TU12, 4.3.5, TU29, 6.8.4 (a), TC3, 6.8.4 (b), TE9, 6.8.4 (b), TE10, 6.8.4 (c), TA1, 9.1.1.2, AT vehicle; paraphrase, not yet reviewed)
Carriage
Operation provision S23: Chapter 8.4 supervision applies in bulk or tanks above 3 000 kg or 3 000 litres; not triggered for packaged carriage. (ADR 8.5, S23; paraphrase, not yet reviewed)

Assembled from FreightUtils' meanings of the Table A codes, not the official text. A statement marked “not yet reviewed” has not yet been checked against ADR by a person.

Class 5.1 — Oxidising Substances & Organic Peroxides
UN 2426Class 5.1 — Oxidising Substances & Organic Peroxides
Packing Group
N/A
Not applicable
Classification Code
O1
Tunnel Code
(E) meaning →
Code governing tunnel passage
Transport Category
0
For the 1,000-point rule (0 = highest restriction)
Hazard ID No.
59
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 0
Never exempt — any quantity requires full ADR compliance
Per-substance max
0 kg/L
Per-substance maximum (1.1.3.6.3) — Category 0 is never exempt
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 252
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 252

Refer to ADR 2025 Chapter 3.3 for full text of each provision.

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Other Oxidising Substances & Organic Peroxides near UN 2426 (Class 5.1)

UN 2427
POTASSIUM CHLORATE, AQUEOUS SOLU…
UN 2428
SODIUM CHLORATE, AQUEOUS SOLUTION
UN 2429
CALCIUM CHLORATE, AQUEOUS SOLUTION
UN 2464
BERYLLIUM NITRATE
UN 2465
DICHLOROISOCYANURIC ACID, DRY or…
All Class 5.1 UN numbers →
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📅Data: UNECE ADR 2025 (ECE/TRANS/352), via EU Directive 2008/68/EC. Last verified October 2026

ADR reference data only. Classification is the consignor's legal responsibility. Consult a DGSA for compliance decisions.

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