UN 1751

CHLOROACETIC ACID, SOLID

UN 1751 — ADR 2025 Table A: class 6.1, classification code TC2, packing group II, labels 6.1 +8, special provisions —, limited quantity 500 g, excepted quantity E4, packing instructions P002 IBC08, transport category 2, tunnel restriction code (D/E), hazard identification number 68.

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

Table A — ADR 2025 (ECE/TRANS/352), UN 1751
(1) UN No.1751
(2) Name and descriptionCHLOROACETIC ACID, SOLID
(3a) Class6.1
(3b) Classification codeTC2
(4) Packing groupII
(5) Labels6.1 +8
(6) Special provisions—
(7a) Limited quantities500 g
(7b) Excepted quantitiesE4
(8) Packaging: packing instructionsP002 IBC08
(9a) Packaging: special packing provisionsB4
(9b) Packaging: mixed packing provisionsMP10
(10) Portable tanks and bulk containers: instructionsT3
(11) Portable tanks and bulk containers: special provisionsTP33
(12) ADR tank: tank codeSGAH
(13) ADR tank: special provisionsTU15 TE19
(14) Vehicle for tank carriageAT
(15) Transport category (Tunnel restriction code)2 (D/E)
(16) Special provisions for carriage: packagesV11
(17) Special provisions for carriage: bulk—
(18) Special provisions for carriage: loading, unloading and handlingCV13 CV28
(19) Special provisions for carriage: operationS9 S19
(20) Hazard identification No.68

ADR 2027 (accepted) — no change for UN 1751

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 (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 6.1 (Toxic substances), model 8 (Corrosive substances) (ADR 5.2.2.2.2, label model No. 6.1, 5.2.2.2.2, label model No. 8; 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. Special packing provision B4: Flexible, fibreboard and wooden IBCs must be sift-proof and water-resistant, or be lined with a liner that is. Mixed packing provision MP10: Up to 5 kg per inner packaging may be mixed with same-class goods of other codes, other classes that permit it, or non-ADR goods. (ADR 4.1.4.1, P002, 4.1.4.2, IBC08, 4.1.4.2, IBC08, B4, 4.1.10.4, MP10; 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 SGAH: ADR tank code for Classes 1 and 3–9: solid tank, G (general minimum), openings A, hermetically closed. — 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; H: hermetically closed (see 1.2.1) Tank provision TU15: Tank must not be used to carry foodstuffs, articles of consumption or animal feeds. Tank provision TE19: Top fittings recessed, valved or shielded against overturning; bottom fittings recessed 200 mm or rail-protected; rear fittings behind the 9.7.6 bumper. 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 SGAH, 4.3.5, TU15, 6.8.4 (b), TE19, 9.1.1.2, AT vehicle; paraphrase, not yet reviewed)
Carriage
Carriage provision V11: IBCs other than metal or rigid plastics IBCs must be carried in closed or sheeted vehicles or containers. Loading provision CV13: After a leak or spill, clean (and if needed disinfect or decontaminate) the vehicle or container before reuse; check other goods for contamination. Loading provision CV28: Pointer: the provisions of 7.5.4 apply. Operation provision S9: Any quantity: avoid service stops near inhabited or busy places; longer stops there need authority consent. Operation provision S19: Chapter 8.4 vehicle supervision applies when the total mass in the vehicle exceeds 5 000 kg. (ADR 7.2.4, V11, 7.5.11, CV13, 7.5.11, CV28, 8.5, S9, 8.5, S19; 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 6.1 — Toxic & Infectious SubstancesPacking Group II
UN 1751Class 6.1 — Toxic & Infectious SubstancesPG II
Packing Group
II
Medium danger
Classification Code
TC2
Tunnel Code
(D/E) meaning →
Code governing tunnel passage
Transport Category
2
For the 1,000-point rule (0 = highest restriction)
Hazard ID No.
68
Kemler code
Limited Quantity
500 g
Max per inner package for LQ relief
Excepted Quantity
E4
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
500 g
Max per inner packaging for LQ relief (Chapter 3.4)
Excepted Quantity
E4
Max 1 ml/g per inner, 500 ml/g per outer package (Chapter 3.5)
Tunnel Code
Governs which tunnel categories the load may pass
Hazard Labels Required
Label 6.1Label 8

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

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Other Toxic & Infectious Substances near UN 1751 (Class 6.1)

UN 1722
ALLYL CHLOROFORMATE
UN 1737
BENZYL BROMIDE
UN 1738
BENZYL CHLORIDE
UN 1750
CHLOROACETIC ACID SOLUTION
UN 1752
CHLOROACETYL CHLORIDE
All Class 6.1 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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