Hazmat & Dangerous Goods Barcode Labels
Barcode labeling for hazardous materials — UN number encoding, GHS integration, DOT compliance, and dual-purpose identification labels.
Hazmat & Dangerous Goods Barcode Labels
Shipping hazardous materials requires specialized barcode labels that comply with DOT, IATA, and international regulations. These labels must encode product identification data alongside safety classification information.
Regulatory Framework
| Authority | Scope | Key Standard |
|---|---|---|
| DOT (US) | Ground transport | 49 CFR Parts 100-185 |
| IATA | Air transport | IATA Dangerous Goods Regulations (DGR) |
| IMO | Ocean transport | IMDG Code |
| UN | International | UN Recommendations (Orange Book) |
Hazmat Label Data Requirements
A hazmat shipping label must include:
| Element | Source | Barcode Encoded? |
|---|---|---|
| UN Number | UN Recommendations | Yes (AI 7003 or custom) |
| Proper shipping name | DOT/IATA | No (human-readable only) |
| Hazard class/division | DOT/IATA | Depends on system |
| Packing group | DOT/IATA | Optional |
| Product identifier (GS1 Standards & Identifiers">GTIN) | GS1 | Yes (AI 01) |
| Batch/lot | Manufacturer | Yes (AI 10) |
| Quantity | Shipper | Yes (AI 37 or 310n) |
GS1-128 for Hazmat
GS1-128 barcodes on hazmat shipments encode standard AIs plus hazmat-specific data:
(01)09506000134352(10)BATCH-A(3103)002500
GTIN Batch 2.500 kg
The barcode identifies the product for supply chain purposes. The hazmat classification travels in the shipping documents and on the diamond-shaped hazard labels.
GHS Integration
The Globally Harmonized System (GHS) for chemical classification requires specific label elements:
- Signal word (Danger or Warning)
- Hazard pictograms
- Hazard statements
- Precautionary statements
- Supplier identification
While GHS elements are typically human-readable, the barcode on the same label identifies the product for inventory and supply chain tracking.
Dual-Purpose Labels
Many hazmat products carry dual-purpose labels:
- GS1-128 barcode: For supply chain identification and tracking
- Hazard diamond/placard: For safety and emergency response
- SDS reference: Link to Safety Data Sheet
- Emergency contact: Required by DOT for transport
Scanning Hazmat Barcodes in the Warehouse
WMS systems use barcode scanning for hazmat products to:
- Enforce storage compatibility rules (scan location, system checks neighbor products)
- Track hazmat inventory quantities per storage area (regulatory limits)
- Generate required shipping documentation from barcode data
- Trigger special handling workflows (PPE requirements, ventilation checks)
Air Cargo Specific Requirements
IATA has specific barcode requirements for dangerous goods shipped by air:
- Shipper's Declaration for Dangerous Goods must reference the barcode-tracked shipment
- Package marks must be legible and durable for the entire transport chain
- Barcode quality must ensure reliable scanning at all handling points
Implementation Recommendations
- Encode product identification (GTIN, batch, quantity) in standard GS1-128 format
- Apply hazard labels and barcodes as separate elements on the package
- Configure WMS to flag hazmat products at scanning for special handling
- Train warehouse staff on hazmat barcode workflows and emergency procedures
- Audit label compliance against current DOT/IATA/IMO regulations quarterly