UN 3128

SELF-HEATING SOLID, TOXIC, ORGANIC, N.O.S.

UN 3128 (variant 1 of 2, packing group II) — ADR 2025 Table A: class 4.2, classification code ST2, packing group II, labels 4.2 +6.1, special provisions 274, limited quantity 0, excepted quantity E2, packing instructions P410 IBC05, transport category 2, tunnel restriction code (D/E), hazard identification number 46.

UN 3128 (variant 2 of 2, packing group III) — ADR 2025 Table A: class 4.2, classification code ST2, packing group III, labels 4.2 +6.1, special provisions 274, limited quantity 0, excepted quantity E1, packing instructions P002 IBC08 R001, transport category 3, tunnel restriction code (E), hazard identification number 46.

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

Table A — ADR 2025 (ECE/TRANS/352), UN 3128 — variant 1 of 2, packing group II
(1) UN No.3128
(2) Name and descriptionSELF-HEATING SOLID, TOXIC, ORGANIC, N.O.S.
(3a) Class4.2
(3b) Classification codeST2
(4) Packing groupII
(5) Labels4.2 +6.1
(6) Special provisions274
(7a) Limited quantities0
(7b) Excepted quantitiesE2
(8) Packaging: packing instructionsP410 IBC05
(9a) Packaging: special packing provisions—
(9b) Packaging: mixed packing provisionsMP14
(10) Portable tanks and bulk containers: instructionsT3
(11) Portable tanks and bulk containers: special provisionsTP33
(12) ADR tank: tank codeSGAN
(13) ADR tank: special provisions—
(14) Vehicle for tank carriageAT
(15) Transport category (Tunnel restriction code)2 (D/E)
(16) Special provisions for carriage: packagesV1
(17) Special provisions for carriage: bulk—
(18) Special provisions for carriage: loading, unloading and handlingCV28
(19) Special provisions for carriage: operation—
(20) Hazard identification No.46
Table A — ADR 2025 (ECE/TRANS/352), UN 3128 — variant 2 of 2, packing group III
(1) UN No.3128
(2) Name and descriptionSELF-HEATING SOLID, TOXIC, ORGANIC, N.O.S.
(3a) Class4.2
(3b) Classification codeST2
(4) Packing groupIII
(5) Labels4.2 +6.1
(6) Special provisions274
(7a) Limited quantities0
(7b) Excepted quantitiesE1
(8) Packaging: packing instructionsP002 IBC08 R001
(9a) Packaging: special packing provisionsB3
(9b) Packaging: mixed packing provisionsMP14
(10) Portable tanks and bulk containers: instructionsT1
(11) Portable tanks and bulk containers: special provisionsTP33
(12) ADR tank: tank codeSGAN
(13) ADR tank: special provisions—
(14) Vehicle for tank carriageAT
(15) Transport category (Tunnel restriction code)3 (E)
(16) Special provisions for carriage: packagesV1
(17) Special provisions for carriage: bulk—
(18) Special provisions for carriage: loading, unloading and handlingCV28
(19) Special provisions for carriage: operation—
(20) Hazard identification No.46

ADR 2027 (accepted) — no change for UN 3128

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 — variant 1 of 2, packing group II

Tunnels
Tunnel code (D/E): in tanks, Prohibited in D, E (bulk or tanks); in other carriage, Prohibited in E. Bulk/tanks: A, B, C. Packages: A, B, C, D. (ADR 8.6.4; from the ADR table itself)
Small-load exemption
Transport category 2: at most 333 per transport unit under 1.1.3.6, counted ×3 toward the 1,000-point limit (ADR 1.1.3.6.3; from the ADR table itself)
Labels
Labels: model 4.2 (Substances liable to spontaneous combustion), model 6.1 (Toxic substances) (ADR 5.2.2.2.2, label model No. 4.2, 5.2.2.2.2, label model No. 6.1; paraphrase, not yet reviewed)
Packing
Packing instruction P410: Solids of PG II/III: combination, single drums, jerricans, boxes, bags, composites and pressure receptacles, with net mass limits. Packing instruction IBC05: IBC05 allows metal IBCs, rigid plastics IBCs (11H1 to 31H2) and composite IBCs 11HZ1, 21HZ1 and 31HZ1. Mixed packing provision MP14: Up to 6 kg per inner packaging may be mixed with goods of other codes or classes that permit it, or with non-ADR goods. (ADR 4.1.4.1, P410, 4.1.4.2, IBC05, 4.1.10.4, MP14; paraphrase, not yet reviewed)
Tanks
Portable tank instruction T3: Portable tank, Class 1 and 3–9: test 2.65 bar; shell See 6.7.2.4.2; relief Normal; bottom openings See 6.7.2.6.2. Portable tank provision TP33: The assigned tank instruction covers granular/powdered solids and solids loaded hot but carried as a solid mass. Tank code SGAN: ADR tank code for Classes 1 and 3–9: solid tank, G (general minimum), openings A, valves/devices N. — S: tank for solid-state substances (powdery or granular); G: minimum calculation pressure under the general requirements of 6.8.2.1.14; A: filling or discharge openings at the bottom, each with 2 closures; N: has no 6.8.2.2.6 breather device and is not hermetically closed 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 T3, 4.2.5.3, TP33, 4.3.4.1.1, tank code SGAN, 9.1.1.2, AT vehicle; paraphrase, not yet reviewed)
Carriage
Carriage provision V1: Packages must go on a closed or sheeted vehicle or in a closed or sheeted container; open vehicles and containers are not allowed. Loading provision CV28: Pointer: the provisions of 7.5.4 apply. (ADR 7.2.4, V1, 7.5.11, CV28; 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.

In plain words — variant 2 of 2, packing group III

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 3: at most 1000 per transport unit under 1.1.3.6, counted ×1 toward the 1,000-point limit (ADR 1.1.3.6.3; from the ADR table itself)
Labels
Labels: model 4.2 (Substances liable to spontaneous combustion), model 6.1 (Toxic substances) (ADR 5.2.2.2.2, label model No. 4.2, 5.2.2.2.2, label model No. 6.1; paraphrase, not yet reviewed)
Packing
Packing instruction P002: General packing instruction for solids: combination, single, composite packagings and pressure receptacles, with net mass limits by packing group. Packing instruction IBC08: IBC08 is the widest solids IBC instruction: metal, rigid plastics, composite, fibreboard 11G, wooden and flexible 13-series IBCs. Packing instruction R001: R001 permits light gauge metal packagings 0A1 and 0A2 up to 40 l / 50 kg for packing groups II and III; packing group I is not allowed. Special packing provision B3: Flexible IBCs must be sift-proof and water-resistant, or carry a liner that is. Mixed packing provision MP14: Up to 6 kg per inner packaging may be mixed with goods of other codes or classes that permit it, or with non-ADR goods. (ADR 4.1.4.1, P002, 4.1.4.2, IBC08, 4.1.4.1, R001, 4.1.4.2, IBC08, B3, 4.1.10.4, MP14; paraphrase, not yet reviewed)
Tanks
Portable tank instruction T1: Portable tank, Class 1 and 3–9: test 1.5 bar; shell See 6.7.2.4.2; relief Normal; bottom openings See 6.7.2.6.2. Portable tank provision TP33: The assigned tank instruction covers granular/powdered solids and solids loaded hot but carried as a solid mass. Tank code SGAN: ADR tank code for Classes 1 and 3–9: solid tank, G (general minimum), openings A, valves/devices N. — S: tank for solid-state substances (powdery or granular); G: minimum calculation pressure under the general requirements of 6.8.2.1.14; A: filling or discharge openings at the bottom, each with 2 closures; N: has no 6.8.2.2.6 breather device and is not hermetically closed 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 T1, 4.2.5.3, TP33, 4.3.4.1.1, tank code SGAN, 9.1.1.2, AT vehicle; paraphrase, not yet reviewed)
Carriage
Carriage provision V1: Packages must go on a closed or sheeted vehicle or in a closed or sheeted container; open vehicles and containers are not allowed. Loading provision CV28: Pointer: the provisions of 7.5.4 apply. (ADR 7.2.4, V1, 7.5.11, CV28; 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 4.2 — Flammable SolidsPacking Group II2 variants
UN 3128 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 3128Class 4.2 — Flammable SolidsPG IIVariant 1 of 2
SELF-HEATING SOLID, TOXIC, ORGANIC, N.O.S.
Packing Group
II
Medium danger
Classification Code
ST2
Tunnel Code
(D/E) meaning →
Code governing tunnel passage
Transport Category
2
For the 1,000-point rule (0 = highest restriction)
Hazard ID No.
46
Kemler code
Limited Quantity
0
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
Not permitted
No limited-quantity relief for this entry (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 274
May alter scope or limits — full text in ADR 2025 Chapter 3.3
Hazard Labels Required
Label 4.2Label 6.1

These labels must be displayed on packages and vehicle placards in accordance with ADR 2025.

Special Provisions
SP 274

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

UN 3128Class 4.2 — Flammable SolidsPG IIIVariant 2 of 2
SELF-HEATING SOLID, TOXIC, ORGANIC, N.O.S.
Packing Group
III
Low danger
Classification Code
ST2
Tunnel Code
(E) meaning →
Code governing tunnel passage
Transport Category
3
For the 1,000-point rule (0 = highest restriction)
Hazard ID No.
46
Kemler code
Limited Quantity
0
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
Not permitted
No limited-quantity relief for this entry (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 274
May alter scope or limits — full text in ADR 2025 Chapter 3.3
Hazard Labels Required
Label 4.2Label 6.1

These labels must be displayed on packages and vehicle placards in accordance with ADR 2025.

Special Provisions
SP 274

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

Check if UN 3128 qualifies for 1.1.3.6 exemption
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Other Flammable Solids near UN 3128 (Class 4.2)

UN 3088
SELF-HEATING SOLID, ORGANIC, N.O.S.
UN 3126
SELF-HEATING SOLID, CORROSIVE, O…
UN 3127
SELF-HEATING SOLID, OXIDIZING, N…
UN 3174
TITANIUM DISULPHIDE
UN 3183
SELF-HEATING LIQUID, ORGANIC, N.…
All Class 4.2 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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