☣️ UN 3095 • CLASS 8
UN 3095 — Corrosive solid, self-heating, n.o.s.
Placard: Corrosive. ERG Guide 136. 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 3095 Quick Details
UN 3095
Product name: Corrosive solid, self-heating, n.o.s.
DOT Class: 8
Placard type: Corrosive
ERG Guide: 136 (check current ERG)
Initial isolation: ERG 136: Initial isolation 50m in all directions; protect persons downwind; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation
Common Hazards of UN 3095
- Extremely flammable; will ignite itself if exposed to air.
- Burns rapidly, releasing dense, white, irritating fumes.
- Substance may be transported in a molten form.
- May re-ignite after fire is extinguished.
- Corrosives in contact with metals may evolve flammable hydrogen gas.
- Containers may explode when heated.
- Fire will produce irritating, corrosive and/or toxic gases.
- TOXIC and/or CORROSIVE; ingestion of substance or inhalation of decomposition products will cause
Chemical Identity & Physical Properties
| Also known as | Corrosive solid, self-heating, not otherwise specifiedSelf-heating corrosive solidUN3095 |
| Appearance | Variable appearance depending on specific substance; typically a solid material that may spontaneously heat when exposed to air. The substance is corrosive and capable of self-heating reactions, may be transported in molten form. |
| Flash Point | Not applicable (self-heating solid) |
| Boiling Point | Variable depending on specific substance |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | May react with water producing heat; caution advised due to corrosive nature |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3095
Extinguishing Media
Dry chemical, dry sand, soda ash; avoid water due to corrosive and self-heating properties
PPE Requirements
⚠️ Level A or B recommended; SCBA required; chemical-resistant suit necessary due to corrosive nature; avoid skin contact
Isolation & Evacuation
ERG 136: Initial isolation 50m in all directions; protect persons downwind; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 136).
First Actions for a UN 3095 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Stay upwind, uphill and/or upstream.
- Keep unauthorized personnel away.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
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UN 3095 — Corrosive solid, self-heating, n.o.s.HAZMAT RADIO NOTE — UN 3095
Product: Corrosive solid, self-heating, n.o.s.
Class 8 / Corrosive / ERG 136
PPE: Level A or B recommended; SCBA required; chemical-resistant suit necessary due to corrosive nature; avoid skin contact
ISOLATION: ERG 136: Initial isolation 50m in all directions; protect persons downwind; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation
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 3095 — Corrosive solid, self-heating, n.o.s.
Class: 8 | Placard: Corrosive | ERG Guide: 136
Appearance: Variable appearance depending on specific substance; typically a solid material that may spontaneously heat when exposed to air. The substance is corrosive and capable of self-heating reactions, may be transported in molten form.
Water Reactivity: May react with water producing heat; caution advised due to corrosive nature
Extinguishing: Dry chemical, dry sand, soda ash; avoid water due to corrosive and self-heating properties
PPE: Level A or B recommended; SCBA required; chemical-resistant suit necessary due to corrosive nature; avoid skin contact
Isolation: ERG 136: Initial isolation 50m in all directions; protect persons downwind; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation
— Key Hazards —
• Extremely flammable; will ignite itself if exposed to air.
• Burns rapidly, releasing dense, white, irritating fumes.
• Substance may be transported in a molten form.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Stay upwind, uphill and/or upstream.
• Keep unauthorized personnel away.
• Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/3095 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3095 Corrosive solid, self-heating, n.o.s. Cls8 ERG136 | allfirefighter.com/hazmat/un/3095SMS / 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/3095
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Frequently Asked Questions about UN 3095
Extremely flammable; will ignite itself if exposed to air. Burns rapidly, releasing dense, white, irritating fumes. Substance may be transported in a molten form. May re-ignite after fire is extinguished. Corrosives in contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Fire will produce irritating, corrosive and/or toxic gases. TOXIC and/or CORROSIVE; ingestion of substance or inhalation of decomposition products will cause
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Stay upwind, uphill and/or upstream. Keep unauthorized personnel away.
Level A or B recommended; SCBA required; chemical-resistant suit necessary due to corrosive nature; avoid skin contact
Water reactivity: May react with water producing heat; caution advised due to corrosive nature. Recommended extinguishing: Dry chemical, dry sand, soda ash; avoid water due to corrosive and self-heating properties.
ERG Guide 136 recommendation: ERG 136: Initial isolation 50m in all directions; protect persons downwind; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 136 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.