UN 3255 — ADR 2025 Table A: class 4.2, classification code SC1, packing group — (CARRIAGE PROHIBITED), labels —, special provisions —, limited quantity —, excepted quantity —, packing instructions —, transport category —, tunnel restriction code —, hazard identification number —.
UNECE ADR 2025, ECE/TRANS/352 · checked 2026-10-28
| (1) UN No. | 3255 |
|---|---|
| (2) Name and description | tert-BUTYL HYPOCHLORITE |
| (3a) Class | 4.2 |
| (3b) Classification code | SC1 |
| (4) Packing group | CARRIAGE PROHIBITED |
| (5) Labels | — |
| (6) Special provisions | — |
| (7a) Limited quantities | — |
| (7b) Excepted quantities | — |
| (8) Packaging: packing instructions | — |
| (9a) Packaging: special packing provisions | — |
| (9b) Packaging: mixed packing provisions | — |
| (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) | — |
| (16) Special provisions for carriage: packages | — |
| (17) Special provisions for carriage: bulk | — |
| (18) Special provisions for carriage: loading, unloading and handling | — |
| (19) Special provisions for carriage: operation | — |
| (20) Hazard identification No. | — |
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=3255&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).
ADR 2025 Table A lists UN 3255 (tert-BUTYL HYPOCHLORITE) as “CARRIAGE PROHIBITED” — it may not be carried by road under ADR. No packing group, transport category, or 1.1.3.6 small-load exemption applies: the entry is banned from carriage, not exempt from it.
GET /api/adr?un=3255ADR reference data only. Classification is the consignor's legal responsibility. Consult a DGSA for compliance decisions.
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