☣️ UN 0028 • CLASS 1
Black powder, compressed
Placard: Explosive 1.1D. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
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Quick details
UN 0028
Class: 1
Placard type: Explosive 1.1D
ERG: Guide 112 (check current ERG)
Isolation: ERG 112: isolate 800m all directions; evacuate 1600m if fire or if contents exposed
Chemical & Response Details
| Also known as | GunpowderBlack powder explosivePowder, smokeless substituteBlasting powder |
| CAS Number | 1336-81-2 |
| Appearance | Black to dark gray granular or pelletized solid. Characteristic sulfurous odor. Compressed into pellets or blocks. |
| Flash Point | Not applicable (explosive solid) |
| Boiling Point | Not applicable (decomposes explosively) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | No significant reaction with water, but moisture can affect sensitivity |
| Extinguishing | Dry chemical, sand; NO water on burning material; may use water fog from distance on exposures |
| PPE | ⚠️ Approach only after consultation with bomb disposal; full protective clothing; minimum 1000 feet distance |
| Isolation | ERG 112: isolate 800m all directions; evacuate 1600m if fire or if contents exposed |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Mass explosion hazard — entire load may detonate simultaneously.
- Severe blast overpressure and fragmentation.
- Sensitive to heat, shock, and friction.
- Secondary fire and debris hazard.
First actions (field-minded)
- 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.
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UN 0028 — Black powder, compressed HAZMAT RADIO NOTE — UN 0028
Product: Black powder, compressed
Class 1 / Explosive 1.1D / ERG 112
PPE: Approach only after consultation with bomb disposal; full protective clothing; minimum 1000 feet distance
ISOLATION: ERG 112: isolate 800m all directions; evacuate 1600m if fire or if contents exposed
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 0028 — Black powder, compressed
Class: 1 | Placard: Explosive 1.1D | ERG Guide: 112
Appearance: Black to dark gray granular or pelletized solid. Characteristic sulfurous odor. Compressed into pellets or blocks.
Water Reactivity: No significant reaction with water, but moisture can affect sensitivity
Extinguishing: Dry chemical, sand; NO water on burning material; may use water fog from distance on exposures
PPE: Approach only after consultation with bomb disposal; full protective clothing; minimum 1000 feet distance
Isolation: ERG 112: isolate 800m all directions; evacuate 1600m if fire or if contents exposed
— Key Hazards —
• Mass explosion hazard — entire load may detonate simultaneously.
• Severe blast overpressure and fragmentation.
• Sensitive to heat, shock, and friction.
— First Actions —
• 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.
SOURCE: allfirefighter.com/hazmat/un/0028 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0028 Black powder, compressed Cls1 ERG112 | allfirefighter.com/hazmat/un/0028SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/0028
Related UN numbers (same class)
Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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FAQ
Mass explosion hazard — entire load may detonate simultaneously. Severe blast overpressure and fragmentation. Sensitive to heat, shock, and friction. Secondary fire and debris hazard.
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.
Approach only after consultation with bomb disposal; full protective clothing; minimum 1000 feet distance
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 112 and your department SOP/SOG for incident-specific protective actions.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles. This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.