☣️ UN 3547 • CLASS 8
Articles containing corrosive substance, n.o.s.
Placard: Corrosive. 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 3547
Class: 8
Placard type: Corrosive
ERG: Guide 154 (check current ERG)
Isolation: ERG 154: isolate spill or leak area immediately for at least 25-50 meters in all directions; if fire involved, isolate 800 meters in all directions
Chemical & Response Details
| Also known as | Corrosive articles NOSArticles with corrosive materialsManufactured articles containing corrosive substancesCorrosive substance articles not otherwise specified |
| Appearance | Manufactured articles or devices containing corrosive substances. Physical appearance varies depending on the article design and corrosive material contained within. |
| Flash Point | Not applicable (articles) |
| Boiling Point | Not applicable (articles) |
| Vapor Density | Not applicable (articles) |
| Water Reactivity | Variable depending on corrosive substance contained; avoid water contact until article contents identified |
| Extinguishing | Do not use water or foam until corrosive contents identified; dry chemical or CO2 may be appropriate |
| PPE | ⚠️ Level B minimum with chemical-resistant suit; SCBA required; avoid any skin contact with leaking or damaged articles |
| Isolation | ERG 154: isolate spill or leak area immediately for at least 25-50 meters in all directions; if fire involved, isolate 800 meters in all directions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
- Contact with molten substance may cause severe burns to skin and eyes.
- Avoid any skin contact.
- Fire may produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive
- Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.).
- Corrosives in contact with metals may evolve flammable hydrogen gas.
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.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- 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 3547 — Articles containing corrosive substance, HAZMAT RADIO NOTE — UN 3547
Product: Articles containing corrosive substance, n.o.s.
Class 8 / Corrosive / ERG 154
PPE: Level B minimum with chemical-resistant suit; SCBA required; avoid any skin contact with leaking or damaged articles
ISOLATION: ERG 154: isolate spill or leak area immediately for at least 25-50 meters in all directions; if fire involved, isolate 800 meters 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 3547 — Articles containing corrosive substance, n.o.s.
Class: 8 | Placard: Corrosive | ERG Guide: 154
Appearance: Manufactured articles or devices containing corrosive substances. Physical appearance varies depending on the article design and corrosive material contained within.
Water Reactivity: Variable depending on corrosive substance contained; avoid water contact until article contents identified
Extinguishing: Do not use water or foam until corrosive contents identified; dry chemical or CO2 may be appropriate
PPE: Level B minimum with chemical-resistant suit; SCBA required; avoid any skin contact with leaking or damaged articles
Isolation: ERG 154: isolate spill or leak area immediately for at least 25-50 meters in all directions; if fire involved, isolate 800 meters in all directions
— Key Hazards —
• TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
• Contact with molten substance may cause severe burns to skin and eyes.
• Avoid any skin contact.
— 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.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/3547 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3547 Articles containing corrosive substance, n.o.s. Cls8 ERG154 | allfirefighter.com/hazmat/un/3547SMS / 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/3547
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FAQ
TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Corrosives in contact with metals may evolve flammable hydrogen gas.
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 B minimum with chemical-resistant suit; SCBA required; avoid any skin contact with leaking or damaged articles
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 154 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.