☣️ UN 1292 • CLASS 3
UN 1292 — Tetraethyl silicate
Placard: Flammable. ERG Guide 129. 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
UN 1292 Quick Details
UN 1292
Product name: Tetraethyl silicate
DOT Class: 3
Placard type: Flammable
ERG Guide: 129 (check current ERG)
Initial isolation: ERG 129: Small spill isolate 30m all directions; large spill isolate 100m all directions, then protect downwind 300m day or 800m night
Common Hazards of UN 1292
- HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
- Vapors may form explosive mixtures with air.
- Vapors may travel to source of ignition and flash back.
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapor explosion hazard indoors, outdoors or in sewers.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
- Runoff to sewer may create fire or explosion hazard.
- Containers may explode when heated.
Chemical Identity & Physical Properties
| Also known as | Ethyl silicateTetraethoxysilaneTEOSSilicic acid tetraethyl esterEthyl orthosilicate |
| CAS Number | 78-10-4 |
| Appearance | Colorless liquid with a faint, alcohol-like odor. Liquid at room temperature with a relatively low viscosity. |
| Flash Point | 52°C (126°F) |
| Boiling Point | 169°C (336°F) |
| Vapor Density | 7.3 (much heavier than air) |
| Water Reactivity | Slowly hydrolyzes in water, producing ethanol and silicic acid. Non-violent reaction. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1292
Extinguishing Media
Alcohol-resistant foam (AR-AFFF), CO2, dry chemical, water spray for cooling
PPE Requirements
⚠️ Level B minimum with SCBA. Chemical-resistant gloves and suit recommended due to skin irritation potential.
Isolation & Evacuation
ERG 129: Small spill isolate 30m all directions; large spill isolate 100m all directions, then protect downwind 300m day or 800m night
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 129).
First Actions for a UN 1292 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 for at least 50 meters (150 feet) in all directions.
- Consider initial downwind evacuation for at least 300 meters (1000 feet).
Advertisement
📋 Copy & Share Field Card
UN 1292 — Tetraethyl silicateHAZMAT RADIO NOTE — UN 1292
Product: Tetraethyl silicate
Class 3 / Flammable / ERG 129
PPE: Level B minimum with SCBA. Chemical-resistant gloves and suit recommended due to skin irritation potential.
ISOLATION: ERG 129: Small spill isolate 30m all directions; large spill isolate 100m all directions, then protect downwind 300m day or 800m night
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 1292 — Tetraethyl silicate
Class: 3 | Placard: Flammable | ERG Guide: 129
Appearance: Colorless liquid with a faint, alcohol-like odor. Liquid at room temperature with a relatively low viscosity.
Water Reactivity: Slowly hydrolyzes in water, producing ethanol and silicic acid. Non-violent reaction.
Extinguishing: Alcohol-resistant foam (AR-AFFF), CO2, dry chemical, water spray for cooling
PPE: Level B minimum with SCBA. Chemical-resistant gloves and suit recommended due to skin irritation potential.
Isolation: ERG 129: Small spill isolate 30m all directions; large spill isolate 100m all directions, then protect downwind 300m day or 800m night
— Key Hazards —
• HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
• Vapors may form explosive mixtures with air.
• Vapors may travel to source of ignition and flash back.
— 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/1292 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1292 Tetraethyl silicate Cls3 ERG129 | ERG 129: Small spill isolate 30m all directions; large spill isolate 100m all di | allfirefighter.com/hazmat/un/1292SMS / 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/1292
Advertisement
Frequently Asked Questions about UN 1292
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer 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 Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level B minimum with SCBA. Chemical-resistant gloves and suit recommended due to skin irritation potential.
Water reactivity: Slowly hydrolyzes in water, producing ethanol and silicic acid. Non-violent reaction.. Recommended extinguishing: Alcohol-resistant foam (AR-AFFF), CO2, dry chemical, water spray for cooling.
ERG Guide 129 recommendation: ERG 129: Small spill isolate 30m all directions; large spill isolate 100m all directions, then protect downwind 300m day or 800m night
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 129 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.