UN 3506 — ADR 2025 Table A: class 8, classification code CT3, packing group —, labels 8 +6.1, special provisions 366, limited quantity 5 kg, excepted quantity E0, packing instructions P003, transport category 3, 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 3506
(1) UN No.	3506
(2) Name and description	MERCURY CONTAINED IN MANUFACTURED ARTICLES
(3a) Class	8
(3b) Classification code	CT3
(4) Packing group	—
(5) Labels	8 +6.1
(6) Special provisions	366
(7a) Limited quantities	5 kg
(7b) Excepted quantities	E0
(8) Packaging: packing instructions	P003
(9a) Packaging: special packing provisions	PP90
(9b) Packaging: mixed packing provisions	MP15
(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)	3 (E)
(16) Special provisions for carriage: packages	—
(17) Special provisions for carriage: bulk	—
(18) Special provisions for carriage: loading, unloading and handling	CV13 CV28
(19) Special provisions for carriage: operation	—
(20) Hazard identification No.	—

ADR 2027 (accepted) — no change for UN 3506

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 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 8 (Corrosive substances), model 6.1 (Toxic substances) (ADR 5.2.2.2.2, label model No. 8, 5.2.2.2.2, label model No. 6.1; paraphrase, not yet reviewed)
Packing: Packing instruction P003: Goods go in suitable outer packagings of adequate strength built to 6.1.4; articles and inners must be held so they cannot fall out in transit. Special packing provision PP90: UN 3506 and 3554: sealed inner liners or bags impervious to mercury or gallium must keep the substance in at any orientation. Mixed packing provision MP15: Up to 3 litres 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, P003, 4.1.4.1, P003, PP90, 4.1.10.4, MP15; paraphrase, not yet reviewed)
Carriage: 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. (ADR 7.5.11, CV13, 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 8 — Corrosive Substances

UN 3506Class 8 — Corrosive Substances