☣️ UN 1477 • CLASS 5
Nitrates, inorganic, n.o.s.
Placard: Oxidizer. 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 1477
Class: 5
Placard type: Oxidizer
ERG: Guide 140 (check current ERG)
Isolation: ERG 140: isolate spill 25-50m all directions; if tank/cargo involved in fire, isolate 800m and consider evacuation 800m in all directions
Chemical & Response Details
| Also known as | Inorganic nitrate saltsMetal nitrates n.o.s.Nitrate compoundsOxidizing nitrate salts |
| Appearance | Typically white to colorless crystalline solids or powders. Generally odorless. Appearance varies depending on specific metal nitrate compound. |
| Flash Point | Not applicable (oxidizing solid, not flammable itself) |
| Boiling Point | Varies by compound; most decompose before boiling, typically 400-600C (752-1112F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Most are water soluble; no violent reaction but dissolution may generate heat |
| Extinguishing | Do not use water or foam on fires; use dry chemical, sand, or dry earth only |
| PPE | ⚠️ Level B minimum for spills; SCBA and full protective clothing required for fire situations; avoid dust inhalation |
| Isolation | ERG 140: isolate spill 25-50m all directions; if tank/cargo involved in fire, isolate 800m and consider evacuation 800m in all directions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- These substances will accelerate burning when involved in a fire.
- Some may decompose explosively when heated or involved in a fire.
- May explode from heat or contamination.
- Some will react explosively with hydrocarbons (fuels).
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
- Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or
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
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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UN 1477 — Nitrates, inorganic, n.o.s. HAZMAT RADIO NOTE — UN 1477
Product: Nitrates, inorganic, n.o.s.
Class 5 / Oxidizer / ERG 140
PPE: Level B minimum for spills; SCBA and full protective clothing required for fire situations; avoid dust inhalation
ISOLATION: ERG 140: isolate spill 25-50m all directions; if tank/cargo involved in fire, isolate 800m and consider evacuation 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 1477 — Nitrates, inorganic, n.o.s.
Class: 5 | Placard: Oxidizer | ERG Guide: 140
Appearance: Typically white to colorless crystalline solids or powders. Generally odorless. Appearance varies depending on specific metal nitrate compound.
Water Reactivity: Most are water soluble; no violent reaction but dissolution may generate heat
Extinguishing: Do not use water or foam on fires; use dry chemical, sand, or dry earth only
PPE: Level B minimum for spills; SCBA and full protective clothing required for fire situations; avoid dust inhalation
Isolation: ERG 140: isolate spill 25-50m all directions; if tank/cargo involved in fire, isolate 800m and consider evacuation 800m in all directions
— Key Hazards —
• These substances will accelerate burning when involved in a fire.
• Some may decompose explosively when heated or involved in a fire.
• May explode from heat or contamination.
— 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/1477 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1477 Nitrates, inorganic, n.o.s. Cls5 ERG140 | allfirefighter.com/hazmat/un/1477SMS / 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/1477
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FAQ
These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire. May explode from heat or contamination. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard. Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or
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 for spills; SCBA and full protective clothing required for fire situations; avoid dust inhalation
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 140 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.