☣️ UN 1372 • CLASS 4
Fibers, animal or vegetable, burnt, wet or damp
Placard: Spontaneously Combustible. 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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Quick details
UN 1372
Class: 4
Placard type: Spontaneously Combustible
ERG: Guide 133 (check current ERG)
Isolation: ERG 133: isolate spill area minimum 25m in all directions; if material is dry or smoldering, treat as active fire hazard with extended isolation
Chemical & Response Details
| Also known as | burnt animal fibersburnt vegetable fiberswet animal fibersdamp plant fiberscharred organic fibersscorched textile waste |
| Appearance | Blackened or darkened fibrous material from animal sources (wool, hair, silk) or plant sources (cotton, jute, hemp) that has been partially burned and is wet or damp. Appears as charred, friable mass with residual moisture. |
| Flash Point | Not applicable (already partially combusted material) |
| Boiling Point | Not applicable (solid fibrous material) |
| Vapor Density | Not applicable (solid material) |
| Water Reactivity | No significant reaction with water; moisture actually reduces fire hazard by lowering ignitability |
| Extinguishing | Water spray, dry chemical, CO2, foam suitable; water application preferred to maintain dampness |
| PPE | ⚠️ Level D minimum for handling wet material; Level C with SCBA if dry or smoldering; avoid inhalation of dust from charred fibers |
| Isolation | ERG 133: isolate spill area minimum 25m in all directions; if material is dry or smoldering, treat as active fire hazard with extended isolation |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Flammable/combustible material.
- May be ignited by friction, heat, sparks or flames.
- Some may burn rapidly with flare-burning effect.
- Powders, dusts, shavings, borings, turnings or cuttings may explode or burn with explosive violence.
- Substance may be transported in a molten form at a temperature that may be above its flash point.
- May re-ignite after fire is extinguished.
- Fire may produce irritating and/or toxic gases.
- Contact may cause burns to skin and eyes.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Isolate spill or leak area for at least 25 meters (75 feet) in all directions.
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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UN 1372 — Fibers, animal or vegetable, burnt, wet HAZMAT RADIO NOTE — UN 1372
Product: Fibers, animal or vegetable, burnt, wet or damp
Class 4 / Spontaneously Combustible / ERG 133
PPE: Level D minimum for handling wet material; Level C with SCBA if dry or smoldering; avoid inhalation of dust from charred fibers
ISOLATION: ERG 133: isolate spill area minimum 25m in all directions; if material is dry or smoldering, treat as active fire hazard with extended isolation
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 1372 — Fibers, animal or vegetable, burnt, wet or damp
Class: 4 | Placard: Spontaneously Combustible | ERG Guide: 133
Appearance: Blackened or darkened fibrous material from animal sources (wool, hair, silk) or plant sources (cotton, jute, hemp) that has been partially burned and is wet or damp. Appears as charred, friable mass with residual moisture.
Water Reactivity: No significant reaction with water; moisture actually reduces fire hazard by lowering ignitability
Extinguishing: Water spray, dry chemical, CO2, foam suitable; water application preferred to maintain dampness
PPE: Level D minimum for handling wet material; Level C with SCBA if dry or smoldering; avoid inhalation of dust from charred fibers
Isolation: ERG 133: isolate spill area minimum 25m in all directions; if material is dry or smoldering, treat as active fire hazard with extended isolation
— Key Hazards —
• Flammable/combustible material.
• May be ignited by friction, heat, sparks or flames.
• Some may burn rapidly with flare-burning effect.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Isolate spill or leak area for at least 25 meters (75 feet) in all directions.
SOURCE: allfirefighter.com/hazmat/un/1372 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1372 Fibers, animal or vegetable, burnt, wet or damp Cls4 ERG133 | allfirefighter.com/hazmat/un/1372SMS / 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/1372
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FAQ
Flammable/combustible material. May be ignited by friction, heat, sparks or flames. Some may burn rapidly with flare-burning effect. Powders, dusts, shavings, borings, turnings or cuttings may explode or burn with explosive violence. Substance may be transported in a molten form at a temperature that may be above its flash point. May re-ignite after fire is extinguished. Fire may produce irritating and/or toxic gases. Contact may cause burns to skin and eyes.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level D minimum for handling wet material; Level C with SCBA if dry or smoldering; avoid inhalation of dust from charred fibers
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 133 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.