☣️ UN 1757 • CLASS 8
UN 1757 — Chromic fluoride, solution
Placard: Corrosive. ERG Guide 154. 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 1757 Quick Details
UN 1757
Product name: Chromic fluoride, solution
DOT Class: 8
Placard type: Corrosive
ERG Guide: 154 (check current ERG)
Initial isolation: ERG 154: isolate spill 25-50m all directions; if tank/rail car involved in fire, isolate 800m all directions and evacuate
Common Hazards of UN 1757
- 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
| Also known as | Chromium(III) fluoride solutionChromium trifluoride solutionChromic fluoride aqueous solution |
| CAS Number | 7788-97-8 |
| Appearance | Green to violet aqueous solution with no distinct odor. Corrosive liquid at room temperature. |
| Flash Point | Not applicable (aqueous solution) |
| Boiling Point | Approximately 100C (212F), varies with concentration |
| Vapor Density | Not applicable (aqueous solution) |
| Water Reactivity | No significant reaction; already dissolved in water |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1757
Extinguishing Media
Water spray, fog, or regular foam may be used for fire control
PPE Requirements
⚠️ Level B minimum; SCBA required; chemical-resistant suit, gloves, and boots; avoid all skin contact
Isolation & Evacuation
ERG 154: isolate spill 25-50m all directions; if tank/rail car involved in fire, isolate 800m all directions and evacuate
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 154).
First Actions for a UN 1757 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
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📋 Copy & Share Field Card
UN 1757 — Chromic fluoride, solutionHAZMAT RADIO NOTE — UN 1757
Product: Chromic fluoride, solution
Class 8 / Corrosive / ERG 154
PPE: Level B minimum; SCBA required; chemical-resistant suit, gloves, and boots; avoid all skin contact
ISOLATION: ERG 154: isolate spill 25-50m all directions; if tank/rail car involved in fire, isolate 800m all directions and evacuate
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 1757 — Chromic fluoride, solution
Class: 8 | Placard: Corrosive | ERG Guide: 154
Appearance: Green to violet aqueous solution with no distinct odor. Corrosive liquid at room temperature.
Water Reactivity: No significant reaction; already dissolved in water
Extinguishing: Water spray, fog, or regular foam may be used for fire control
PPE: Level B minimum; SCBA required; chemical-resistant suit, gloves, and boots; avoid all skin contact
Isolation: ERG 154: isolate spill 25-50m all directions; if tank/rail car involved in fire, isolate 800m all directions and evacuate
— 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/1757 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1757 Chromic fluoride, solution Cls8 ERG154 | allfirefighter.com/hazmat/un/1757SMS / 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/1757
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Frequently Asked Questions about UN 1757
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; SCBA required; chemical-resistant suit, gloves, and boots; avoid all skin contact
Water reactivity: No significant reaction; already dissolved in water. Recommended extinguishing: Water spray, fog, or regular foam may be used for fire control.
ERG Guide 154 recommendation: ERG 154: isolate spill 25-50m all directions; if tank/rail car involved in fire, isolate 800m all directions and evacuate
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.