☣️ UN 3547 • CLASS 8
UN 3547 — Articles containing corrosive substance, n.o.s.
Placard: Corrosive. ERG Guide 154. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ Verification required:
Broad or variable material category; verify exact product, SDS and shipping papers.
⚠️ 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.
UN 3547 is Articles containing corrosive substance, n.o.s., assigned to ERG Guide 154. This entry should be verified with shipping papers, labels and the SDS before responders commit to close-range action.
Hazard overview: Articles containing corrosive substance, n.o.s. may cause burns to skin, eyes and respiratory tissue if contents are released. Fire or water contact may produce irritating, corrosive or toxic gases.
Response guidance: Use ERG Guide 154, confirm the exact contents, isolate the area, keep unauthorized personnel away, control ignition sources and choose extinguishing agents based on the article or material involved.
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UN 3547 Quick Details
UN 3547
Product name: Articles containing corrosive substance, n.o.s.
DOT Class: 8
Placard type: Corrosive
ERG Guide: 154 (check current ERG)
Initial 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
Common Hazards of UN 3547
- 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.
Chemical Identity & Physical Properties
Manufactured articles or devices containing corrosive substances. Physical appearance varies depending on the article design and corrosive material contained within.
| 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 |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3547
Extinguishing Media
Do not use water or foam until corrosive contents identified; dry chemical or CO2 may be appropriate
PPE Requirements
⚠️ Level B minimum with chemical-resistant suit; SCBA required; avoid any skin contact with leaking or damaged articles
Level B minimum with chemical-resistant suit; SCBA required; avoid any skin contact with leaking or damaged articles. Select final PPE using ERG guidance, SDS, monitoring and incident command.
Isolation & Evacuation
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
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 154).
First Actions for a UN 3547 Incident
- 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 —
• 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
SOURCE: allfirefighter.com/hazmat/un/articles-containing-corrosive-substance-un-3547 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3547 Articles containing corrosive substance, n.o.s. Cls8 ERG154 | allfirefighter.com/hazmat/un/articles-containing-corrosive-substance-un-3547SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/articles-containing-corrosive-substance-un-3547
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Frequently Asked Questions about UN 3547
UN 3547 is Articles containing corrosive substance, n.o.s., assigned to ERG Guide 154.
ERG Guide 154 applies for initial isolation, protective actions and first response guidance.
Articles containing corrosive substance, n.
Level B minimum with chemical-resistant suit; SCBA required; avoid any skin contact with leaking or damaged articles.
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.
Water compatibility depends on the specific contents and incident conditions. Check ERG 154, SDS and incident command before applying water.
Verify shipping papers, container markings, SDS, package condition and whether contents are leaking, burning or exposed.
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.