☣️ UN 2441 • CLASS 4
UN 2441 — Titanium trichloride mixture, pyrophoric
Placard: Spontaneously Combustible. ERG Guide 135. 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 2441 Quick Details
UN 2441
Product name: Titanium trichloride mixture, pyrophoric
DOT Class: 4
Placard type: Spontaneously Combustible
ERG Guide: 135 (check current ERG)
Initial isolation: ERG 135: isolate 25m in all directions initially. If fire, isolate 800m all directions and consider evacuation.
Common Hazards of UN 2441
- Flammable/combustible material.
- May ignite on contact with moist air or moisture.
- May burn rapidly with flare-burning effect.
- Some react vigorously or explosively on contact with water.
- Some may decompose explosively when heated or involved in a fire.
- May re-ignite after fire is extinguished.
- Runoff may create fire or explosion hazard.
- Containers may explode when heated.
Chemical Identity & Physical Properties
| Also known as | Titanium(III) chlorideTrichlorotitaniumTitanous chlorideTiCl3 |
| CAS Number | 7705-07-9 |
| Appearance | Dark violet to purple-black crystalline solid or powder. Odorless when pure. Highly reactive with moisture. |
| Flash Point | Not applicable (pyrophoric solid) |
| Boiling Point | Not applicable (decomposes) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Reacts violently with water producing heat, hydrogen chloride fumes, and hydrogen gas. Do not use water. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2441
Extinguishing Media
Dry sand, dry chemical, soda ash. Do not use water, foam, or CO2.
PPE Requirements
⚠️ Level B minimum with full face SCBA. Chemical-resistant suit required. Avoid any moisture contact.
Isolation & Evacuation
ERG 135: isolate 25m in all directions initially. If fire, isolate 800m all directions and consider evacuation.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 135).
First Actions for a UN 2441 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Stay upwind, uphill and/or upstream.
- Keep unauthorized personnel away.
- 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 2441 — Titanium trichloride mixture, pyrophoricHAZMAT RADIO NOTE — UN 2441
Product: Titanium trichloride mixture, pyrophoric
Class 4 / Spontaneously Combustible / ERG 135
PPE: Level B minimum with full face SCBA. Chemical-resistant suit required. Avoid any moisture contact.
ISOLATION: ERG 135: isolate 25m in all directions initially. If fire, isolate 800m all directions and consider evacuation.
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 2441 — Titanium trichloride mixture, pyrophoric
Class: 4 | Placard: Spontaneously Combustible | ERG Guide: 135
Appearance: Dark violet to purple-black crystalline solid or powder. Odorless when pure. Highly reactive with moisture.
Water Reactivity: Reacts violently with water producing heat, hydrogen chloride fumes, and hydrogen gas. Do not use water.
Extinguishing: Dry sand, dry chemical, soda ash. Do not use water, foam, or CO2.
PPE: Level B minimum with full face SCBA. Chemical-resistant suit required. Avoid any moisture contact.
Isolation: ERG 135: isolate 25m in all directions initially. If fire, isolate 800m all directions and consider evacuation.
— Key Hazards —
• Flammable/combustible material.
• May ignite on contact with moist air or moisture.
• May burn rapidly with flare-burning effect.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Stay upwind, uphill and/or upstream.
• Keep unauthorized personnel away.
• 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/2441 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2441 Titanium trichloride mixture, pyrophoric Cls4 ERG135 | allfirefighter.com/hazmat/un/2441SMS / 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/2441
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Frequently Asked Questions about UN 2441
Flammable/combustible material. May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. Some react vigorously or explosively on contact with water. Some may decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished. Runoff may create fire or explosion hazard. Containers may explode when heated.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Stay upwind, uphill and/or upstream. Keep unauthorized personnel away.
Level B minimum with full face SCBA. Chemical-resistant suit required. Avoid any moisture contact.
Water reactivity: Reacts violently with water producing heat, hydrogen chloride fumes, and hydrogen gas. Do not use water.. Recommended extinguishing: Dry sand, dry chemical, soda ash. Do not use water, foam, or CO2..
ERG Guide 135 recommendation: ERG 135: isolate 25m in all directions initially. If fire, isolate 800m all directions and consider evacuation.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 135 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.