☣️ UN 2623 • CLASS 4
Firelighters, solid, with flammable liquid
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 2623
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 | solid fire startersbarbecue fire starterscombustible fire lightersparaffin fire starterswax-based fire starters |
| Appearance | Solid blocks, cubes, or sticks typically white, tan, or brown in color, made of porous material impregnated with flammable liquid (often paraffin, kerosene, or petroleum distillates). May have waxy or petroleum-like odor. |
| Flash Point | Varies by formulation, typically -4 to 38C (25 to 100F) depending on flammable liquid content |
| Boiling Point | Not applicable (solid composite material) |
| Vapor Density | Not applicable (solid material, though vapors from liquid component may be heavier than air) |
| Water Reactivity | No significant reaction with water; water may not be effective for extinguishment due to flammable liquid content |
| Extinguishing | Dry chemical, CO2, foam, or water spray; use fog patterns to cool containers |
| PPE | ⚠️ Structural firefighters' protective clothing provides limited protection; SCBA and full protective gear recommended for fire situations |
| 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 2623 — Firelighters, solid, with flammable liqu HAZMAT RADIO NOTE — UN 2623
Product: Firelighters, solid, with flammable liquid
Class 4 / Flammable Solid / ERG 133
PPE: Structural firefighters' protective clothing provides limited protection; SCBA and full protective gear recommended for fire situations
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 2623 — Firelighters, solid, with flammable liquid
Class: 4 | Placard: Flammable Solid | ERG Guide: 133
Appearance: Solid blocks, cubes, or sticks typically white, tan, or brown in color, made of porous material impregnated with flammable liquid (often paraffin, kerosene, or petroleum distillates). May have waxy or petroleum-like odor.
Water Reactivity: No significant reaction with water; water may not be effective for extinguishment due to flammable liquid content
Extinguishing: Dry chemical, CO2, foam, or water spray; use fog patterns to cool containers
PPE: Structural firefighters' protective clothing provides limited protection; SCBA and full protective gear recommended for fire situations
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/2623 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2623 Firelighters, solid, with flammable liquid Cls4 ERG133 | allfirefighter.com/hazmat/un/2623SMS / 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/2623
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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.
Structural firefighters' protective clothing provides limited protection; SCBA and full protective gear recommended for fire situations
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.