UN 0079 — Hexanitrodiphenylamine; Dipicrylamine
Placard: Explosive 1.1D. ERG Guide 112. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 0079, Hexanitrodiphenylamine (also known as Dipicrylamine or Aurantia), is a powerful explosive solid classified as Class 1.1D under the ERG Guide 112. It poses a mass explosion hazard, meaning the entire load may detonate simultaneously upon exposure to heat, shock, or friction.
Hazard overview: UN 0079 presents a mass explosion hazard capable of producing severe blast overpressure and deadly fragmentation across a wide area. This material is highly sensitive to heat, mechanical shock, and friction, making any disturbance during an incident extremely dangerous.
Response guidance: Emergency responders should isolate a minimum of 500 meters in all directions and evacuate at least 1,600 meters downwind if fire or detonation risk is present. Do not use water or foam on burning Hexanitrodiphenylamine; only dry chemical, sand, or inert smothering agents are appropriate for fire suppression.
UN 0079 Quick Details
Common Hazards of UN 0079
- Mass explosion hazard — entire load may detonate simultaneously.
- Severe blast overpressure and fragmentation.
- Sensitive to heat, shock, and friction.
- Secondary fire and debris hazard.
Chemical Identity & Physical Properties
UN 0079 Hexanitrodiphenylamine appears as a yellow to orange crystalline solid or fine powder with no significant odor at room temperature.
| Also known as | DipicrylamineHexyl2,2',4,4',6,6'-HexanitrodiphenylamineHNDAurantia |
| CAS Number | 131-73-7 |
| Appearance | Yellow to orange crystalline solid with no significant odor at room temperature. Exists as fine crystals or powder. |
| Flash Point | Not applicable (explosive solid) |
| Boiling Point | Not applicable (decomposes before boiling) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | No significant reaction with water; insoluble |
Fireground Response Guidance — UN 0079
Extinguishing Media
PPE Requirements
Level A chemical protective suit with SCBA is required for spill response, and full Explosive Ordnance Disposal (EOD) protective equipment is mandatory for any fire or detonation scenario involving UN 0079.
Isolation & Evacuation
First Actions for a UN 0079 Incident
- CALL 911. Then call emergency response telephone number on shipping paper.
- Establish large isolation zone — minimum 500 meters in all directions.
- Stage upwind, uphill; limit personnel to essential responders only.
- Request Hazmat + law enforcement + additional resources immediately.
- Do not fight fire — evacuate and isolate; let burn if no life safety risk.
- Protect exposures only if safe and directed by command.
- Consult current ERG Guide 112 and follow SOP/SOG.
📋 Copy & Share Field Card
UN 0079 — Hexanitrodiphenylamine; DipicrylamineUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.