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Practical Guide to Dangerous Goods (DG)
Many importers and exporters assume that Dangerous Goods (DG) are limited to explosives or highly corrosive acids. However, everyday products such as perfumes, aerosols, nail polish, and lithium batteries are subject to strict international regulations where every technical detail matters.
📌 Fundamental Compliance Rule
The legal and technical liability for the correct classification, packaging, and declaration of dangerous goods rests directly with the shipper (exporter), not the carrier or freight forwarder.
Technical and Operational Fundamentals of DG
When a product is categorized as dangerous goods, the logistics rules change radically. Overlooking these provisions leads to customs holds, port storage surcharges, and severe penalties that jeopardize crew safety.
What is DG Classification and Why Does It Exist?
The international regulatory framework was established by United Nations (UN) expert committees to standardize identification, segregation, and cross-border emergency response. The system assigns three essential identifiers to each substance:
- UN Number: Global 4-digit code (for example, UN 1266 for perfumery products, UN 3480 for lithium-ion batteries).
- Hazard Class: Categorization from 1 to 9 based on the primary risk (gases, flammable liquids, toxic substances, corrosives, etc.).
- Packing Group: Determines the intrinsic degree of danger: Packing Group I (High Danger), Packing Group II (Medium Danger), and Packing Group III (Low Danger).
Packaging: From Conventional Boxes to UN-Certified Packaging
Standard commercial corrugated cardboard is not approved to contain dangerous substances. In regulated transport, packaging certified through rigorous destructive laboratory tests (drop test, hydrostatic pressure, stacking, and leakproofness) is required:
- UN Alphanumeric Code: All certified packaging displays a legible and indelible code assigned by the UN (for example,
4G/Y145/S/26/NL). - Absorbent Cushioning for Liquids: In combination packaging containing liquids, the use of inert absorbent material capable of retaining 100% of the liquid in the event of accidental breakage is mandatory.
Mandatory Labeling and Marking
The outer package serves as an immediate visual warning for ground handling staff at ports, warehouses, and airports. Technical marking includes:
- Hazard Diamonds (100 mm x 100 mm): Diamond-shaped labels featuring standardized pictograms and colors according to the class and subsidiary hazards.
- Proper Shipping Name (PSN): Official international designation, strictly prohibiting the use of trade names or commercial brand names.
- Orientation Arrows: Placed on two opposite vertical sides of any package containing liquid receptacles.
Key Technical Documentation
Unlike general cargo, technical instruments take precedence over commercial paperwork for dangerous goods. These are the indispensable documents for any international shipment:
| Document | Primary Function | Responsible Party / Issuer |
|---|---|---|
| Safety Data Sheet (SDS / MSDS) | 16-section technical document. Section 14 legally determines UN classification, hazard class, and packing group. | Manufacturer / Chemist |
| Shipper's Declaration for Dangerous Goods (IATA DGD) | Mandatory sworn declaration under IATA regulations. Certifies strict compliance with packaging, labeling, and net quantity limits. | Shipper / Certified Agent |
| Dangerous Goods Ocean Declaration | Advance notification required by ocean carriers detailing flashpoint, segregation, and stowage technical data. | Exporter / Shipper |
| Container Packing Certificate | Formally certifies that the FCL or LCL container was properly lashed, secured, and blocked in accordance with the IMDG Code. | Depot / Consolidator |
International Transport: Ocean (IMDG) vs. Air (IATA)
The physical nature of each transport mode dictates distinct operational dynamics that must be budgeted from the start of the operation:
✈️ Air Mode (IATA / ICAO)
The most restrictive mode due to barometric pressure and temperature gradients during flight:
- Passenger Aircraft Restrictions: Certain substances are forbidden on passenger flights and restricted strictly to freighters (bearing the Cargo Aircraft Only - CAO label).
- Lithium Batteries (UN 3480): Standalone batteries must be shipped at a state of charge (SoC) not exceeding 30% of their rated capacity.
🚢 Ocean Mode (IMDG Code)
Accommodates larger cargo volumes but demands rigorous onboard vessel safety compliance:
- Segregation Tables: Strict container-vessel stowage rules preventing chemically incompatible shipments from being stowed adjacently.
- Marine Pollutants: Require specific on-deck or under-deck stowage and prior approval from the ocean carrier's safety department (DG Desk).
Operational Impact Comparison Matrix
Direct comparison between standard general cargo handling and specialized dangerous goods operations:
| Operational Variable | General Cargo | Dangerous Goods (DG) |
|---|---|---|
| Freight Rate | Standard market rate. | Base freight + Hazard Surcharge (DG Surcharge from 20% to 100%+). |
| Booking Lead Time | Typical confirmation within 24 to 48 hours. | Prior technical carrier review required (3 to 7 business days). |
| Customs Inspections | Random or targeted inspection. | Mandatory and thorough physical and documentary inspection. |
| Terminal Storage | Standard storage rates. | Dedicated DG safety yards and bonded storage with premium tier rates. |
📌 Strategic Recommendation
Before quoting or arranging any shipment of products containing chemicals, volatile liquids, or electronics with integrated batteries, always request an up-to-date 16-section Safety Data Sheet (SDS) from the manufacturer. This preliminary technical review prevents unexpected surcharges, cargo rejections, and delays at ports or airports.
Ship your dangerous goods with complete technical compliance
At Dietrich Logistics, we coordinate SDS technical validation, airline and carrier DG Desk approvals, and UN-certified packaging to ensure your cargo moves without disruptions or unexpected costs.
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