☣️ UN 1871 • CLASS 4
Titanium hydride
Placard: Flammable Solid. 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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Quick details
UN 1871
Class: 4
Placard type: Flammable Solid
ERG: Guide 170 (check current ERG)
Isolation: ERG 170: isolate spill 25m all directions; if fire, isolate 800m all directions and consider evacuation
Chemical & Response Details
| Also known as | Titanium dihydrideTitanium(II) hydrideTiH2 |
| CAS Number | 7704-98-5 |
| Appearance | Gray to dark gray metallic powder, odorless. Solid at room temperature. |
| Flash Point | Not applicable (pyrophoric solid) |
| Boiling Point | Not applicable (decomposes) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Reacts violently with water producing flammable hydrogen gas and heat; may ignite spontaneously |
| Extinguishing | Dry chemical, dry sand, dry graphite; DO NOT use water, foam, or CO2 |
| PPE | ⚠️ Level B minimum with SCBA; chemical-resistant suit required; avoid friction and static discharge |
| Isolation | ERG 170: isolate spill 25m all directions; if fire, isolate 800m all directions and consider evacuation |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- May react violently or explosively on contact with water.
- Some are transported in flammable liquids.
- May be ignited by friction, heat, sparks or flames.
- Some of these materials will burn with intense heat.
- Dusts or fumes may form explosive mixtures in air.
- Containers may explode when heated.
- May re-ignite after fire is extinguished.
- Oxides from metallic fires are a severe health hazard.
First actions (field-minded)
- 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
- Consider initial downwind evacuation for at least 50 meters (160 feet).
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UN 1871 — Titanium hydride HAZMAT RADIO NOTE — UN 1871
Product: Titanium hydride
Class 4 / Flammable Solid / ERG 170
PPE: Level B minimum with SCBA; chemical-resistant suit required; avoid friction and static discharge
ISOLATION: ERG 170: isolate spill 25m all directions; 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 1871 — Titanium hydride
Class: 4 | Placard: Flammable Solid | ERG Guide: 170
Appearance: Gray to dark gray metallic powder, odorless. Solid at room temperature.
Water Reactivity: Reacts violently with water producing flammable hydrogen gas and heat; may ignite spontaneously
Extinguishing: Dry chemical, dry sand, dry graphite; DO NOT use water, foam, or CO2
PPE: Level B minimum with SCBA; chemical-resistant suit required; avoid friction and static discharge
Isolation: ERG 170: isolate spill 25m all directions; if fire, isolate 800m all directions and consider evacuation
— Key Hazards —
• May react violently or explosively on contact with water.
• Some are transported in flammable liquids.
• May be ignited by friction, heat, sparks or flames.
— 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/1871 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1871 Titanium hydride Cls4 ERG170 | ERG 170: isolate spill 25m all directions; if fire, isolate 800m all directions | allfirefighter.com/hazmat/un/1871SMS / 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/1871
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FAQ
May react violently or explosively on contact with water. Some are transported in flammable liquids. May be ignited by friction, heat, sparks or flames. Some of these materials will burn with intense heat. Dusts or fumes may form explosive mixtures in air. Containers may explode when heated. May re-ignite after fire is extinguished. Oxides from metallic fires are a severe health hazard.
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 SCBA; chemical-resistant suit required; avoid friction and static discharge
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 170 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.