UN 3103 — ADR 2025 Table A: class 5.2, classification code P1, packing group —, labels 5.2, special provisions 122 274, limited quantity 25 ml, excepted quantity E0, packing instructions P520, transport category 1, tunnel restriction code (D), hazard identification number —.

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

Table A — ADR 2025 (ECE/TRANS/352), UN 3103
(1) UN No.	3103
(2) Name and description	ORGANIC PEROXIDE TYPE C, LIQUID
(3a) Class	5.2
(3b) Classification code	P1
(4) Packing group	—
(5) Labels	5.2
(6) Special provisions	122 274
(7a) Limited quantities	25 ml
(7b) Excepted quantities	E0
(8) Packaging: packing instructions	P520
(9a) Packaging: special packing provisions	—
(9b) Packaging: mixed packing provisions	MP4
(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 (D)
(16) Special provisions for carriage: packages	V1
(17) Special provisions for carriage: bulk	—
(18) Special provisions for carriage: loading, unloading and handling	CV15 CV20 CV22 CV24 CV29
(19) Special provisions for carriage: operation	S8 S18
(20) Hazard identification No.	—

ADR 2027 (accepted) — no change for UN 3103

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.

This entry under ADR 2027 on the API: /api/adr?un=3103&edition=2027 (editions and as_of).

ADR 2025 is the edition that applies until ADR 2027 takes effect on 1 January 2027, and FreightUtils answers on it by default until then; the API answers on ADR 2027 now with edition=2027. After that date, 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): in tanks, Prohibited in D, E; in other carriage, Prohibited in D, E. Categories A, B, C. (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 5.2 (Organic peroxides) (ADR 5.2.2.2.2, label model No. 5.2; paraphrase, not yet reviewed)
Packing: Packing instruction P520: Organic peroxides (5.2) and self-reactive substances (4.1): packing methods OP1-OP8 set per-package quantity limits; metal only for OP7/OP8. Mixed packing provision MP4: No mixing with other classes or non-ADR goods, except an organic peroxide hardener or compound system may go with its Class 3 substances. (ADR 4.1.4.1, P520, 4.1.10.4, MP4; 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 CV15: Pointer: the mixed-loading limits in 7.5.5.3 apply. Loading provision CV20: Chapter 5.3, 7.1.7.4.7, 7.1.7.4.8 and V1 do not apply if packed to P520 OP1/OP2 and ≤ 10 kg per transport unit. Loading provision CV22: Load for free air circulation; above 5 000 kg per vehicle or large container, split into stacks ≤ 5 000 kg with ≥ 0.05 m gaps. Loading provision CV24: Clean the vehicle or container of combustible debris before loading; no readily flammable stowage material. Loading provision CV29: Packages must be stored upright. Operation provision S8: Above 2 000 kg on a transport unit, avoid service stops near inhabited or busy places; longer stops there need authority consent. Operation provision S18: Chapter 8.4 vehicle supervision applies when the total mass in the vehicle exceeds 2 000 kg. (ADR 7.2.4, V1, 7.5.11, CV15, 7.5.11, CV20, 7.5.11, CV22, 7.5.11, CV24, 7.5.11, CV29, 8.5, S8, 8.5, S18; 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 5.2 — Oxidising Substances & Organic Peroxides

UN 3103Class 5.2 — Oxidising Substances & Organic Peroxides