Dasteck ChemicalsYantai Dasteck Chemicals Co., Ltd.
Direct answer
Exporting thiourea dioxide normally needs six sets of papers: an SDS, a COA, dangerous-goods packaging certification, a transport condition test report, a certificate of origin and customs documentation. The product is UN 3341, Class 4.2 self-heating substance, packing group II, so it cannot travel as general cargo.
1. Document checklist
| Document | Issued by | Purpose |
|---|---|---|
| SDS | Manufacturer | Composition, hazard classification and transport information, needed for export and destination clearance |
| COA | Manufacturer | Measured data for the batch, matched to the order specification |
| Dangerous goods packaging certificate | Entry-exit inspection and quarantine authority | Shows the packaging meets the UN specification |
| Packaging performance certificate | Packaging manufacturer | Shows the packaging itself passed UN performance testing |
| Transport condition test report | Third-party testing body | Normally required for air and sea booking |
| Certificate of origin | CCPIT or customs | Tariff preference and clearance |
| Customs declaration, packing list, invoice | Exporter | Base customs paperwork |
2. Commonly used HS codes (for reference)
| Country or region | Common code |
|---|---|
| China | 2930.90.99 |
| EU CN and TARIC | 2930.90.90 |
| United States HTS | 2930.90.49 |
Final classification rests with the importing customs authority and can differ by port and shipment. Where classification is in doubt, apply for an advance ruling; we can supply the product data you need.
3. Booking and declaration points
4. Three easy mistakes
1. Shipping in ordinary paper bags: it does not meet UN packaging requirements and the carrier may refuse it
2. Sending an SDS without the transport test report: some shipping lines and airlines will decline the booking outright
3. Copying a competitor HS code: a wrong classification brings duty reassessment and penalty risk at the destination
Sources
Transport classification comes from our SDS and transport test report; the HS codes are the common declaration practice in public sources and are subject to customs ruling.