UN 3341 THIOUREA DIOXIDE: class, labels, packing group and ADR tunnel code
UN 3341 in the dangerous goods lists of ADR 2025 (road) and the IMDG Code (sea). The proper shipping name, class and packing group come from your safety data sheet, section 14: pick the entry that matches it.
Checked against the sources on 27 October 2026
BAM Datenbank GEFAHRGUT, dl-de/by-2-0
Checked against the sources on 27 October 2026
The line on the transport document
ADR 5.4.1.1.1 asks for the UN number, the proper shipping name, the labels (or the class), the packing group and the tunnel code, in this order and with nothing in between. For each entry:
- UN 3341 THIOUREA DIOXIDE, 4.2, II, (D/E)
- UN 3341 THIOUREA DIOXIDE, 4.2, III, (E)
- A special provision in Column (6) can change the labels; read the special provisions in the table below before you print.
- The tunnel code is needed only when the route passes a tunnel with restrictions; "(─)" is written where Table A gives none.
- Quantity, packages, consignor and consignee complete the document (5.4.1.1.1 (e) to (h)).
Road: ADR 2025, Table A
| Proper shipping name and description | Class | Classification code | Packing group | Labels | Special provisions | Limited quantity | Excepted quantity | Transport category | Tunnel code | Hazard number |
|---|---|---|---|---|---|---|---|---|---|---|
| THIOUREA DIOXIDE | 4.2 | S2 | II | 4.2 | none | 0 | E2 | 2 | D/E | 40 |
| THIOUREA DIOXIDE | 4.2 | S2 | III | 4.2 | none | 0 | E1 | 3 | E | 40 |
Sea: IMDG Code, Amendment 42-24
| Proper shipping name and description | Class | Subsidiary hazard | Packing group | Marine pollutant | Limited quantity | Excepted quantity | EmS | Stowage category |
|---|---|---|---|---|---|---|---|---|
| THIOUREA DIOXIDE | 4.2 | none | II | none | 0 | E2 | F-A, S-J | D |
| THIOUREA DIOXIDE | 4.2 | none | III | none | 0 | E1 | F-A, S-J | D |
Labels, safety data sheet and the full list
- The hazard label for the package under CLP: CLP label generator.
- Section 14 of the safety data sheet carries these transport data: safety data sheet template.
- The ADR transport document and the multimodal form for this entry: dangerous goods declaration kit.
- Every UN number in ADR 2025: UN number list.
This page does not classify a substance: the UN number and packing group come from the manufacturer's classification. Air transport (IATA) is not covered, nor are segregation, stowage rules beyond the category, or national exemptions. Data: ADR 2025 and IMDG Code, Amendment 42-24, downloaded from BAM on 2026-10-27. Changes: selected columns, headings and explanations added; the values are as BAM publishes them.
Sources
- Source: Bundesanstalt für Materialforschung und -prüfung (BAM) – Datenbank GEFAHRGUT – URL: https://tes.bam.de/en/dangerous-goods-database
- Data licence Germany – attribution – Version 2.0 (dl-de/by-2-0)
- BAM Dangerous Goods Dataservice (UN-No. System, ADR and IMDG files)
- UNECE, ADR 2025 (ECE/TRANS/352), Vol. II, 5.4.1.1.1