☣️ UN 2576 • CLASS 8
UN 2576 — Phosphorus oxybromide, molten
Placard: Corrosive. ERG Guide 137. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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.
Advertisement
UN 2576 Quick Details
UN 2576
Product name: Phosphorus oxybromide, molten
DOT Class: 8
Placard type: Corrosive
ERG Guide: 137 (check current ERG)
Initial isolation: ERG 137: Isolate spill 25-50m all directions. For large spills isolate 100m and consider evacuation 300m downwind. If fire, isolate 800m and evacuate 1600m downwind.
Common Hazards of UN 2576
- CORROSIVE and/or TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
- Fire will produce irritating, corrosive and/or toxic gases.
- Reaction with water may generate much heat that will increase the concentration of fumes in the air.
- Contact with molten substance may cause severe burns to skin and eyes.
- Runoff from fire control or dilution water may cause environmental contamination.
- EXCEPT FOR ACETIC ANHYDRIDE (UN1715), THAT IS FLAMMABLE, some of these materials may
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff.
Chemical Identity & Physical Properties
| Also known as | Phosphoryl bromidePOBr3Phosphoric tribromide oxidePhosphorus tribromide oxide |
| CAS Number | 7789-59-5 |
| Appearance | Colorless to pale yellow crystalline solid when cool; presented here as a molten liquid. Pungent, irritating odor. Fumes heavily in moist air. |
| Flash Point | Not applicable (non-flammable corrosive) |
| Boiling Point | 191.7C (377F) |
| Vapor Density | 6.8 (much heavier than air) |
| Water Reactivity | Reacts violently with water, producing corrosive hydrogen bromide and phosphoric acid vapors. Do not use water directly on material. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2576
Extinguishing Media
Dry sand, dry chemical, soda ash. No water or foam. CO2 may be used at a distance.
PPE Requirements
⚠️ Level A recommended for spill response. Full encapsulation, SCBA required. Butyl rubber or Viton gloves. Avoid all contact.
Isolation & Evacuation
ERG 137: Isolate spill 25-50m all directions. For large spills isolate 100m and consider evacuation 300m downwind. If fire, isolate 800m and evacuate 1600m downwind.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 137).
First Actions for a UN 2576 Incident
- 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
Advertisement
📋 Copy & Share Field Card
UN 2576 — Phosphorus oxybromide, moltenHAZMAT RADIO NOTE — UN 2576
Product: Phosphorus oxybromide, molten
Class 8 / Corrosive / ERG 137
PPE: Level A recommended for spill response. Full encapsulation, SCBA required. Butyl rubber or Viton gloves. Avoid all contact.
ISOLATION: ERG 137: Isolate spill 25-50m all directions. For large spills isolate 100m and consider evacuation 300m downwind. If fire, isolate 800m and evacuate 1600m downwind.
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 2576 — Phosphorus oxybromide, molten
Class: 8 | Placard: Corrosive | ERG Guide: 137
Appearance: Colorless to pale yellow crystalline solid when cool; presented here as a molten liquid. Pungent, irritating odor. Fumes heavily in moist air.
Water Reactivity: Reacts violently with water, producing corrosive hydrogen bromide and phosphoric acid vapors. Do not use water directly on material.
Extinguishing: Dry sand, dry chemical, soda ash. No water or foam. CO2 may be used at a distance.
PPE: Level A recommended for spill response. Full encapsulation, SCBA required. Butyl rubber or Viton gloves. Avoid all contact.
Isolation: ERG 137: Isolate spill 25-50m all directions. For large spills isolate 100m and consider evacuation 300m downwind. If fire, isolate 800m and evacuate 1600m downwind.
— Key Hazards —
• CORROSIVE and/or TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
• Fire will produce irritating, corrosive and/or toxic gases.
• Reaction with water may generate much heat that will increase the concentration of fumes in the air.
— 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/2576 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2576 Phosphorus oxybromide, molten Cls8 ERG137 | allfirefighter.com/hazmat/un/2576SMS / 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/2576
Advertisement
Frequently Asked Questions about UN 2576
CORROSIVE and/or TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance Fire will produce irritating, corrosive and/or toxic gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Contact with molten substance may cause severe burns to skin and eyes. Runoff from fire control or dilution water may cause environmental contamination. EXCEPT FOR ACETIC ANHYDRIDE (UN1715), THAT IS FLAMMABLE, some of these materials may May ignite combustibles (wood, paper, oil, clothing, etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff.
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 A recommended for spill response. Full encapsulation, SCBA required. Butyl rubber or Viton gloves. Avoid all contact.
Water reactivity: Reacts violently with water, producing corrosive hydrogen bromide and phosphoric acid vapors. Do not use water directly on material.. Recommended extinguishing: Dry sand, dry chemical, soda ash. No water or foam. CO2 may be used at a distance..
ERG Guide 137 recommendation: ERG 137: Isolate spill 25-50m all directions. For large spills isolate 100m and consider evacuation 300m downwind. If fire, isolate 800m and evacuate 1600m downwind.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 137 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.