UN Dangerous Goods Classification System

Complete reference for Classes 1-9 hazardous materials transport under IATA (air cargo) and IMDG (ocean freight) regulations. Based on UN Recommendations on the Transport of Dangerous Goods.

⚠️ IMPORTANT: This guide is for reference only. Dangerous goods shipping requires specialized training, documentation, packaging, and carrier approvals. Always work with IATA/IMDG-certified freight forwarders for hazmat transport.
🚫 Venix Logix Service Note: We hold IATA/IMDG certifications for Class 2-9 dangerous goods. We do NOT handle Class 1 explosives, ammunition, or pyrotechnics. The Class 1 information below is provided for educational reference only.
CLASS 1

Explosives & Articles Containing Explosives

Definition: Substances and articles with risk of explosion, mass explosion, projection hazard, fire hazard, or minor blast hazard.

1.1 - Mass Explosion Hazard

Substances with mass explosion risk affecting entire load instantly. Examples: TNT, dynamite, certain ammunition.

💥 EXPLOSIVE 1.1
MASS EXPLOSION
1.2 - Projection Hazard

Substances that may project fragments but no mass explosion. Examples: Detonators, certain fireworks.

💥 EXPLOSIVE 1.2
PROJECTION
1.3 - Fire Hazard

Substances with fire hazard and minor blast/projection. Examples: Propellant explosives, certain fireworks.

💥 EXPLOSIVE 1.3
FIRE HAZARD
1.4 - Minor Explosion Hazard

Substances with minor explosion hazard during transport. Examples: Consumer fireworks, signal flares.

💥 EXPLOSIVE 1.4
MINOR HAZARD
1.5 - Very Insensitive

Very insensitive substances with mass explosion hazard only under extreme conditions. Examples: Ammonium nitrate blasting agents.

💥 EXPLOSIVE 1.5
BLASTING AGENT
1.6 - Extremely Insensitive

Extremely insensitive articles with negligible mass explosion probability. Examples: Very insensitive detonating substances.

💥 EXPLOSIVE 1.6
INSENSITIVE
Special Requirements: Class 1 requires government approval for transport, certified packaging (specification markings), compatibility groups (A-S), and segregation from other dangerous goods. Air transport severely restricted or prohibited for 1.1, 1.2, 1.3.
CLASS 2

Gases (Compressed, Liquefied, Dissolved)

Definition: Substances that are gases at 20°C or have vapor pressure >300 kPa at 50°C.

2.1 - Flammable Gases

Gases that ignite in air at 20°C and standard pressure. Examples: Propane, butane, hydrogen, acetylene, aerosols.

🔥 FLAMMABLE GAS
2
2.2 - Non-Flammable, Non-Toxic

Gases that are not flammable or toxic but may cause asphyxiation. Examples: Nitrogen, carbon dioxide, helium, compressed air.

⚪ NON-FLAMMABLE GAS
2
2.3 - Toxic Gases

Gases known to be toxic or corrosive to humans. LC50 ≤5000 ml/m³. Examples: Chlorine, ammonia, sulfur dioxide, phosgene.

☠️ TOXIC GAS
POISON 2
Packaging: Gases require pressure-tested cylinders, cryogenic containers, or pressure drums with certification markings (DOT, TC, UN). Cylinder valves must be protected during transport.
CLASS 3

Flammable Liquids

Definition: Liquids with flash point ≤60°C (closed-cup test) or substances shipped at temperatures ≥ flash point.

Examples: Gasoline, diesel, ethanol, acetone, paint, adhesives, perfume (>24% alcohol), varnish, certain cleaning solvents.

🔥 FLAMMABLE LIQUID
3
Packing Groups:
• PG I: Flash point <23°C, boiling point ≤35°C (highly flammable)
• PG II: Flash point <23°C, boiling point >35°C (flammable)
• PG III: Flash point 23-60°C (combustible)
CLASS 4

Flammable Solids, Spontaneously Combustible, Dangerous When Wet

4.1 - Flammable Solids

Solids that ignite easily and burn vigorously. Self-reactive substances. Examples: Matches, sulfur, nitrocellulose, metal powders.

FLAMMABLE SOLID
4
4.2 - Spontaneously Combustible

Substances liable to spontaneous heating under normal transport conditions or heating in contact with air. Examples: White phosphorus, oily rags, certain metal powders.

🔥 SPONTANEOUSLY
COMBUSTIBLE 4
4.3 - Dangerous When Wet

Substances that emit flammable gases when in contact with water. Examples: Sodium, calcium carbide, lithium, magnesium powder.

💧🔥 DANGEROUS
WHEN WET 4
CLASS 5

Oxidizing Substances & Organic Peroxides

5.1 - Oxidizing Substances

Substances that yield oxygen readily and cause or enhance combustion of other materials. Examples: Hydrogen peroxide, ammonium nitrate, calcium hypochlorite, pool chemicals.

🔥 OXIDIZER
5.1
5.2 - Organic Peroxides

Organic substances containing bivalent -O-O- structure. Thermally unstable, may decompose explosively. Examples: Benzoyl peroxide, methyl ethyl ketone peroxide.

🔥 ORGANIC PEROXIDE
5.2
Temperature Control: Many Class 5.2 organic peroxides require temperature-controlled transport (reefer containers, refrigerated trucks). SADT (Self-Accelerating Decomposition Temperature) determines control/emergency temps.
CLASS 6

Toxic & Infectious Substances

6.1 - Toxic Substances

Substances liable to cause death or serious injury if swallowed, inhaled, or by skin contact. Examples: Pesticides, arsenic compounds, nicotine, cyanides, certain pharmaceuticals.

☠️ TOXIC
6
6.2 - Infectious Substances

Substances containing viable microorganisms causing disease in humans or animals. Examples: Clinical specimens, biological cultures, medical waste, diagnostic samples.

☣️ INFECTIOUS SUBSTANCE
6
Categories:
• Category A (UN2814/UN2900): High risk - affects humans/animals, requires rigid packaging
• Category B (UN3373): Lower risk - biological substance, requires triple packaging
• Exempt specimens: Minimal likelihood of pathogens, basic packaging
CLASS 7

Radioactive Materials

Definition: Materials containing radionuclides where activity concentration and total activity exceed defined values.

Examples: Medical isotopes, industrial radiography sources, uranium ore, contaminated equipment, research materials.

☢️ RADIOACTIVE
7
Transport Categories:
• Category I-WHITE: Minimal radiation (TI = 0)
• Category II-YELLOW: Low radiation (TI = 0.1-1.0)
• Category III-YELLOW: Moderate radiation (TI = 1.0-10)
Requires radiation safety certificates, special packaging (Type A, Type B), and strict documentation.
CLASS 8

Corrosive Substances

Definition: Substances that cause severe damage to living tissue or corrode steel/aluminum by chemical action.

Examples: Sulfuric acid, hydrochloric acid, sodium hydroxide, potassium hydroxide, battery acid, drain cleaners, metal etchants.

🧪
CORROSIVE
8
Packing Groups:
• PG I: Severe corrosion (full thickness destruction in ≤3 min)
• PG II: Significant corrosion (≤1 hour)
• PG III: Minor corrosion (>1 hour but ≤4 hours)
Requires corrosion-resistant packaging, polyethylene or coated steel drums.
CLASS 9

Miscellaneous Dangerous Goods

Definition: Substances and articles presenting danger during transport not covered by other classes.

Examples Include:
  • Lithium batteries (UN3090, UN3480, UN3481) — Most common Class 9
  • Environmentally hazardous substances — Aquatic pollutants (fish/tree symbol)
  • Elevated temperature materials — Asphalt, sulfur ≥100°C
  • Genetically modified organisms (GMO)
  • Dry ice (UN1845) — Carbon dioxide solid
  • Magnetized materials — Affecting aircraft instruments
  • Air bags, seat belt pretensioners
⚠️ MISCELLANEOUS
9
Lithium Battery Regulations: Most restrictive DG in Class 9. Requires Section II packaging, lithium battery handling labels, and special documentation. State of Charge (SoC) limits apply: ≤30% for PI965/PI968.

General Dangerous Goods Requirements

📋 Documentation
• Shipper's Declaration for Dangerous Goods (DGD)
• Safety Data Sheet (SDS)
• Emergency response information
• Special permits (for Class 1, 7)
📦 Packaging
• UN-certified packaging (specification codes)
• Compatibility with substance
• Proper marking and labeling
• Inner packaging, cushioning, absorbents
🏷️ Marking & Labeling
• UN number (e.g., UN1090)
• Proper Shipping Name
• Hazard labels (diamond-shaped, ≥100mm)
• Handling labels (arrows, orientation)
✈️ Air vs 🚢 Sea Differences
• IATA stricter than IMDG
• Quantity limits lower for air
• Some DG forbidden on passenger aircraft
• Cargo Aircraft Only (CAO) designation

Need Dangerous Goods Shipping?

Hazmat transport requires specialized knowledge, certified personnel, and strict regulatory compliance. One documentation error can result in shipment rejection, fines, or safety incidents.

Venix Logix holds IATA/IMDG dangerous goods certifications for Class 2-9 transport. We handle gases, flammable materials, oxidizers, toxic substances, radioactive materials, and corrosives via air (Amsterdam Schiphol), ocean (Rotterdam Port), and ground transport. Note: We do not handle Class 1 explosives, ammunition, or pyrotechnics.

  • Shipper's Declaration preparation and filing
  • UN-certified packaging sourcing and verification
  • Carrier approval and booking (approved DG carriers only)
  • Customs clearance with hazmat documentation
  • 24/7 emergency response support

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