Understanding UN Markings on Dangerous Goods Packaging

UN markings are critical identifiers for compliant transport of hazardous materials. This guide explains what each part of the code means.

1. What is a UN Mark?

The UN mark is a code printed on packages approved for transporting hazardous materials. It certifies the packaging has passed UN performance tests.

2. Breaking Down the UN Code

• UN: Indicates United Nations certification.
• 4GV: Type of packaging — e.g., 4GV is a fibreboard box with inner pack flexibility.
• X: Packing group approval — X (PG I), Y (PG II), or Z (PG III).
• 2024: Year of manufacture.
• IND: Country code of manufacture — IND = India.
• HZP-001: Manufacturer code or certificate number.

Real-World Example of UN Marking

This marking on a 4GV box reads:

• 4GV: Fibreboard box for various inner packagings
• X: Packing Group I (high danger)
• 3: Max gross weight of 3 kg
• S: Suitable for solids
• 24: Manufactured in 2024
• ZA: Country code for South Africa
• TE7876: Manufacturer/test identification

3. Common UN Packaging Codes

• 4G / 4GV: Fibreboard boxes
• 1H1 / 1H2: HDPE drums — 1H1 (closed), 1H2 (open)
• 1A1 / 1A2: Steel drums — 1A1 (closed), 1A2 (open)
• 1G: Fibre drums
• 3H1 / 3H2: Plastic jerry cans

4. Importance of the Packing Group

The packing group denotes the level of danger:

• PG I: High danger (X marking)
• PG II: Medium danger (Y marking)
• PG III: Low danger (Z marking)

5. Why It Matters

Using packaging with correct UN markings ensures:

• Compliance with IATA, IMDG, and ICAO regulations
• Legal transport of hazardous materials
• Reduced risk of leaks, contamination, and penalties

Conclusion

Understanding UN markings allows shippers, handlers, and customs authorities to quickly assess whether a package meets international standards. Hazpack Solutions provides UN-certified packaging across all categories to support safe global transport.

Request a quote to get certified packaging for your cargo.