☣️ UN 3555 • CLASS 3
Trifluoromethyltetrazole-sodium salt in acetone
Placard: Flammable. 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
Quick details
UN 3555
Class: 3
Placard type: Flammable
ERG: Guide 113 (check current ERG)
Isolation: ERG 113: isolate 50m all directions initially; if dried or fire involved, treat as explosive per ERG 112 guidance
Chemical & Response Details
| Also known as | Sodium trifluoromethyltetrazolate in acetoneNaTFMT in acetoneTrifluoromethyltetrazole sodium derivative solution |
| Appearance | Clear to pale yellow liquid solution with characteristic acetone odor. Flammable liquid containing an organic salt that becomes shock-sensitive when dried. |
| Flash Point | -20C (-4F) (acetone carrier) |
| Boiling Point | 56C (133F) (acetone component) |
| Vapor Density | 2.0 (heavier than air) |
| Water Reactivity | Dilutes in water; acetone is water-miscible but dried residue becomes extremely shock-sensitive |
| Extinguishing | Alcohol-resistant foam, CO2, dry chemical; water spray to cool containers but avoid drying out material |
| PPE | ⚠️ Level B minimum with full face SCBA; avoid shock/friction with dried residue; treat any dried material as explosive |
| Isolation | ERG 113: isolate 50m all directions initially; if dried or fire involved, treat as explosive per ERG 112 guidance |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Flammable/combustible material.
- May be ignited by heat, sparks or flames.
- DRIED OUT material may explode if exposed to heat, flame, friction or shock; treat as an
- Keep material wet with water or treat as an explosive (GUIDE 112).
- Runoff to sewer may create fire or explosion hazard.
- Some are toxic and may be fatal if inhaled, ingested or absorbed through skin. Specifically,
- Contact may cause burns to skin and eyes.
- Fire may produce irritating, corrosive and/or toxic gases.
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 immediately for at least 100 meters (330 feet) in all directions.
- Consider initial evacuation for 500 meters (1/3 mile) in all directions.
Advertisement
📋 Copy & Share
UN 3555 — Trifluoromethyltetrazole-sodium salt in HAZMAT RADIO NOTE — UN 3555
Product: Trifluoromethyltetrazole-sodium salt in acetone
Class 3 / Flammable / ERG 113
PPE: Level B minimum with full face SCBA; avoid shock/friction with dried residue; treat any dried material as explosive
ISOLATION: ERG 113: isolate 50m all directions initially; if dried or fire involved, treat as explosive per ERG 112 guidance
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 3555 — Trifluoromethyltetrazole-sodium salt in acetone
Class: 3 | Placard: Flammable | ERG Guide: 113
Appearance: Clear to pale yellow liquid solution with characteristic acetone odor. Flammable liquid containing an organic salt that becomes shock-sensitive when dried.
Water Reactivity: Dilutes in water; acetone is water-miscible but dried residue becomes extremely shock-sensitive
Extinguishing: Alcohol-resistant foam, CO2, dry chemical; water spray to cool containers but avoid drying out material
PPE: Level B minimum with full face SCBA; avoid shock/friction with dried residue; treat any dried material as explosive
Isolation: ERG 113: isolate 50m all directions initially; if dried or fire involved, treat as explosive per ERG 112 guidance
— Key Hazards —
• Flammable/combustible material.
• May be ignited by heat, sparks or flames.
• DRIED OUT material may explode if exposed to heat, flame, friction or shock; treat as an
— 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/3555 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3555 Trifluoromethyltetrazole-sodium salt in acetone Cls3 ERG113 | allfirefighter.com/hazmat/un/3555SMS / 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/3555
Advertisement
FAQ
Flammable/combustible material. May be ignited by heat, sparks or flames. DRIED OUT material may explode if exposed to heat, flame, friction or shock; treat as an Keep material wet with water or treat as an explosive (GUIDE 112). Runoff to sewer may create fire or explosion hazard. Some are toxic and may be fatal if inhaled, ingested or absorbed through skin. Specifically, Contact may cause burns to skin and eyes. Fire may produce irritating, corrosive and/or toxic gases.
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 full face SCBA; avoid shock/friction with dried residue; treat any dried material as explosive
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 113 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.