UN 2466 — ADR 2025 Table A: class 5.1, classification code O2, packing group I, labels 5.1, special provisions —, limited quantity 0, excepted quantity E0, packing instructions P503 IBC06, transport category 1, tunnel restriction code (E), hazard identification number —.

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

Table A — ADR 2025 (ECE/TRANS/352), UN 2466
(1) UN No.	2466
(2) Name and description	POTASSIUM SUPEROXIDE
(3a) Class	5.1
(3b) Classification code	O2
(4) Packing group	I
(5) Labels	5.1
(6) Special provisions	—
(7a) Limited quantities	0
(7b) Excepted quantities	E0
(8) Packaging: packing instructions	P503 IBC06
(9a) Packaging: special packing provisions	—
(9b) Packaging: mixed packing provisions	MP2
(10) Portable tanks and bulk containers: instructions	—
(11) Portable tanks and bulk containers: special provisions	—
(12) ADR tank: tank code	—
(13) ADR tank: special provisions	—
(14) Vehicle for tank carriage	—
(15) Transport category (Tunnel restriction code)	1 (E)
(16) Special provisions for carriage: packages	V10
(17) Special provisions for carriage: bulk	—
(18) Special provisions for carriage: loading, unloading and handling	CV24
(19) Special provisions for carriage: operation	S20
(20) Hazard identification No.	—

ADR 2027 (accepted) — no change for UN 2466

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 1: at most 20 per transport unit under 1.1.3.6, counted ×50 toward the 1,000-point limit (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)
Packing: Packing instruction P503: Oxidizing solids: inners of 5 kg in drums or boxes up to 125 kg (4G 40 kg, 4H1 60 kg); single metal drums 250 kg, fibre/plywood lined drums 200 kg. Packing instruction IBC06: Solids under IBC06 may use metal, rigid plastics or composite (11HZ1/11HZ2/21HZ1/21HZ2/31HZ1) IBCs; see 4.1.3.4 if they may liquefy. Mixed packing provision MP2: No mixed packing: the goods must be alone in their package. (ADR 4.1.4.1, P503, 4.1.4.2, IBC06, 4.1.10.4, MP2; paraphrase, not yet reviewed)
Carriage: Carriage provision V10: IBCs need a closed or sheeted vehicle, or a closed or sheeted container; open units are not allowed. Loading provision CV24: Clean the vehicle or container of combustible debris before loading; no readily flammable stowage material. Operation provision S20: Chapter 8.4 supervision applies above 10 000 kg in packages, or above 3 000 litres in tanks. (ADR 7.2.4, V10, 7.5.11, CV24, 8.5, S20; 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 PeroxidesPacking Group I

UN 2466Class 5.1 — Oxidising Substances & Organic PeroxidesPG I