☣️ UN 0133 • CLASS 1
UN 0133 — Mannitol hexanitrate, wetted with not less than 40% water
Placard: Explosive 1.1D. ERG Guide 112. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ 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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UN 0133 Quick Details
UN 0133
Product name: Mannitol hexanitrate, wetted with not less than 40% water
DOT Class: 1
Placard type: Explosive 1.1D
ERG Guide: 112 (check current ERG)
Initial isolation: ERG 112: isolate 500m all directions in all cases; evacuate 800m if large fire or container exposed to fire; treat as mass explosion hazard
Common Hazards of UN 0133
- Explosion hazard if dried out
- Sensitive to heat, shock, friction
- Runoff may be hazardous
Chemical Identity & Physical Properties
| Also known as | NitromanniteHexanitromanniteMannitol hexanitrate esterMHNNitranitol |
| CAS Number | 15825-70-4 |
| Appearance | White to pale yellow crystalline solid when wetted. Odorless or slight nitrous odor. Shipped as a water-dampened paste or slurry to reduce explosive sensitivity. |
| Flash Point | Not applicable (explosive solid) |
| Boiling Point | Not applicable (decomposes explosively before boiling) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | No significant reaction with water; water acts as desensitizer and must remain present |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 0133
Extinguishing Media
Water spray to maintain wetting; do not allow to dry; alcohol-resistant foam for surrounding fires
PPE Requirements
⚠️ Level A with SCBA required; full explosive ordnance disposal protective equipment recommended; avoid all static, friction, and shock
Isolation & Evacuation
ERG 112: isolate 500m all directions in all cases; evacuate 800m if large fire or container exposed to fire; treat as mass explosion hazard
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 112).
First Actions for a UN 0133 Incident
- CALL 911. Then call emergency response number on shipping paper.
- Isolate area; stage upwind
- Keep product wet — do not allow to dry out
- Request Hazmat + law enforcement
- Consult current ERG Guide 112 and SOP/SOG
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📋 Copy & Share Field Card
UN 0133 — Mannitol hexanitrate, wetted with not leHAZMAT RADIO NOTE — UN 0133
Product: Mannitol hexanitrate, wetted with not less than 40% water
Class 1 / Explosive 1.1D / ERG 112
PPE: Level A with SCBA required; full explosive ordnance disposal protective equipment recommended; avoid all static, friction, and shock
ISOLATION: ERG 112: isolate 500m all directions in all cases; evacuate 800m if large fire or container exposed to fire; treat as mass explosion hazard
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 0133 — Mannitol hexanitrate, wetted with not less than 40% water
Class: 1 | Placard: Explosive 1.1D | ERG Guide: 112
Appearance: White to pale yellow crystalline solid when wetted. Odorless or slight nitrous odor. Shipped as a water-dampened paste or slurry to reduce explosive sensitivity.
Water Reactivity: No significant reaction with water; water acts as desensitizer and must remain present
Extinguishing: Water spray to maintain wetting; do not allow to dry; alcohol-resistant foam for surrounding fires
PPE: Level A with SCBA required; full explosive ordnance disposal protective equipment recommended; avoid all static, friction, and shock
Isolation: ERG 112: isolate 500m all directions in all cases; evacuate 800m if large fire or container exposed to fire; treat as mass explosion hazard
— Key Hazards —
• Explosion hazard if dried out
• Sensitive to heat, shock, friction
• Runoff may be hazardous
— First Actions —
• CALL 911. Then call emergency response number on shipping paper.
• Isolate area; stage upwind
• Keep product wet — do not allow to dry out
• Request Hazmat + law enforcement
SOURCE: allfirefighter.com/hazmat/un/0133 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0133 Mannitol hexanitrate, wetted with not less than 40% water Cls1 ERG112 | allfirefighter.com/hazmat/un/0133SMS / 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/0133
Related UN Numbers in Class 1
Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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Frequently Asked Questions about UN 0133
Explosion hazard if dried out Sensitive to heat, shock, friction Runoff may be hazardous
CALL 911. Then call emergency response number on shipping paper. Isolate area; stage upwind Keep product wet — do not allow to dry out
Level A with SCBA required; full explosive ordnance disposal protective equipment recommended; avoid all static, friction, and shock
Water reactivity: No significant reaction with water; water acts as desensitizer and must remain present. Recommended extinguishing: Water spray to maintain wetting; do not allow to dry; alcohol-resistant foam for surrounding fires.
ERG Guide 112 recommendation: ERG 112: isolate 500m all directions in all cases; evacuate 800m if large fire or container exposed to fire; treat as mass explosion hazard
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.