☣️ UN 2516 • CLASS 6
UN 2516 — Carbon tetrabromide
Placard: Toxic. ERG Guide 151. 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 2516 Quick Details
UN 2516
Product name: Carbon tetrabromide
DOT Class: 6
Placard type: Toxic
ERG Guide: 151 (check current ERG)
Initial isolation: ERG 151: isolate spill/leak area 25-50m all directions; in fire, isolate 800m and evacuate downwind areas
Common Hazards of UN 2516
- Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
- 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
- Containers may explode when heated.
- Runoff may pollute waterways.
Chemical Identity & Physical Properties
| Also known as | TetrabromomethaneMethane tetrabromideCBr4Tetrabromocarbon |
| CAS Number | 558-13-4 |
| Appearance | Colorless to pale yellow crystalline solid with a camphor-like odor. Decomposes at elevated temperatures producing toxic bromine fumes. |
| Flash Point | Not applicable (non-flammable solid) |
| Boiling Point | 189.5C (373F) with decomposition |
| Vapor Density | Not applicable (solid at room temperature) |
| Water Reactivity | Insoluble in water; no significant reaction but hydrolyzes slowly in presence of moisture |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2516
Extinguishing Media
Dry chemical, CO2, sand; water spray may be used to keep containers cool
PPE Requirements
⚠️ Level B minimum with SCBA; chemical-resistant suit required; avoid all skin contact due to severe toxicity
Isolation & Evacuation
ERG 151: isolate spill/leak area 25-50m all directions; in fire, isolate 800m and evacuate downwind areas
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 151).
First Actions for a UN 2516 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.
- 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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📋 Copy & Share Field Card
UN 2516 — Carbon tetrabromideHAZMAT RADIO NOTE — UN 2516
Product: Carbon tetrabromide
Class 6 / Toxic / ERG 151
PPE: Level B minimum with SCBA; chemical-resistant suit required; avoid all skin contact due to severe toxicity
ISOLATION: ERG 151: isolate spill/leak area 25-50m all directions; in fire, isolate 800m and evacuate downwind areas
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 2516 — Carbon tetrabromide
Class: 6 | Placard: Toxic | ERG Guide: 151
Appearance: Colorless to pale yellow crystalline solid with a camphor-like odor. Decomposes at elevated temperatures producing toxic bromine fumes.
Water Reactivity: Insoluble in water; no significant reaction but hydrolyzes slowly in presence of moisture
Extinguishing: Dry chemical, CO2, sand; water spray may be used to keep containers cool
PPE: Level B minimum with SCBA; chemical-resistant suit required; avoid all skin contact due to severe toxicity
Isolation: ERG 151: isolate spill/leak area 25-50m all directions; in fire, isolate 800m and evacuate downwind areas
— Key Hazards —
• Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
• Avoid any skin contact.
• Fire may produce irritating, corrosive and/or toxic gases.
— 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.
• 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/2516 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2516 Carbon tetrabromide Cls6 ERG151 | ERG 151: isolate spill/leak area 25-50m all directions; in fire, isolate 800m an | allfirefighter.com/hazmat/un/2516SMS / 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/2516
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Frequently Asked Questions about UN 2516
Highly toxic, may be fatal if inhaled, ingested or absorbed through skin. 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 Containers may explode when heated. Runoff may pollute waterways.
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 SCBA; chemical-resistant suit required; avoid all skin contact due to severe toxicity
Water reactivity: Insoluble in water; no significant reaction but hydrolyzes slowly in presence of moisture. Recommended extinguishing: Dry chemical, CO2, sand; water spray may be used to keep containers cool.
ERG Guide 151 recommendation: ERG 151: isolate spill/leak area 25-50m all directions; in fire, isolate 800m and evacuate downwind areas
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 151 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.