☣️ UN 1325 • CLASS 4
Flammable solid, organic, n.o.s.
Placard: Flammable Solid. 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 1325
Class: 4
Placard type: Flammable Solid
ERG: Guide 133 (check current ERG)
Isolation: ERG 133: Initial isolation 50m in all directions; if tank/rail car involved in fire, isolate 800m in all directions
Chemical & Response Details
| Also known as | Flammable solid organic NOSCombustible solid organicFlammable organic solid not otherwise specifiedUN1325 |
| Appearance | Generic entry covering various organic solids. Appearance varies by specific material but typically solid at room temperature, may be crystalline, powder, or granular form. Color and odor depend on the specific substance. |
| Flash Point | Not applicable (flammable solid) |
| Boiling Point | Varies by specific material |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Generally no significant reaction with water, though specific materials may vary |
| Extinguishing | Dry chemical, CO2, sand, earth; water spray may be used to cool containers |
| PPE | ⚠️ Level C minimum recommended; SCBA if involved in fire or heavy dust generation; protective gloves and clothing to prevent skin contact |
| Isolation | ERG 133: Initial isolation 50m in all directions; if tank/rail car involved in fire, isolate 800m in all directions |
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 1325 — Flammable solid, organic, n.o.s. HAZMAT RADIO NOTE — UN 1325
Product: Flammable solid, organic, n.o.s.
Class 4 / Flammable Solid / ERG 133
PPE: Level C minimum recommended; SCBA if involved in fire or heavy dust generation; protective gloves and clothing to prevent skin contact
ISOLATION: ERG 133: Initial isolation 50m in all directions; if tank/rail car involved in fire, isolate 800m in all directions
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 1325 — Flammable solid, organic, n.o.s.
Class: 4 | Placard: Flammable Solid | ERG Guide: 133
Appearance: Generic entry covering various organic solids. Appearance varies by specific material but typically solid at room temperature, may be crystalline, powder, or granular form. Color and odor depend on the specific substance.
Water Reactivity: Generally no significant reaction with water, though specific materials may vary
Extinguishing: Dry chemical, CO2, sand, earth; water spray may be used to cool containers
PPE: Level C minimum recommended; SCBA if involved in fire or heavy dust generation; protective gloves and clothing to prevent skin contact
Isolation: ERG 133: Initial isolation 50m in all directions; if tank/rail car involved in fire, isolate 800m in all directions
— 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/1325 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1325 Flammable solid, organic, n.o.s. Cls4 ERG133 | allfirefighter.com/hazmat/un/1325SMS / 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/1325
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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 C minimum recommended; SCBA if involved in fire or heavy dust generation; protective gloves and clothing to prevent skin contact
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.