☣️ UN 3362 • CLASS 6
UN 3362 — Chlorosilanes, poisonous, corrosive, flammable, n.o.s.
Placard: Toxic. ERG Guide 155. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ Verification required:
Broad or variable material category; verify exact product, SDS and shipping papers.
⚠️ 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.
Chlorosilanes, poisonous, corrosive, flammable, n.o.s. covers reactive chlorosilane mixtures where the exact compound must be confirmed from shipping papers or SDS.
Hazard overview: Chlorosilanes can fume in moist air and react violently with water, releasing heat, corrosive hydrogen chloride and potentially flammable gases. Vapors may ignite and form explosive mixtures with air.
Response guidance: Use ERG 155, isolate the spill area, keep personnel upwind and avoid direct water contact. Use dry agents unless product-specific data allows another method.
Advertisement
UN 3362 Quick Details
UN 3362
Product name: Chlorosilanes, poisonous, corrosive, flammable, n.o.s.
DOT Class: 6
Placard type: Toxic
ERG Guide: 155 (check current ERG)
Initial isolation: ERG 155: Isolate spill 50m in all directions. For fire, evacuate 800m downwind. Approach fire from upwind to avoid toxic vapors.
Common Hazards of UN 3362
- HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
- Vapors form explosive mixtures with air: indoors, outdoors and sewers explosion hazards.
- Most vapors are heavier than air; they spread along the ground and collect in low or confined areas.
- Vapors may travel to source of ignition and flash back.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
- Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff.
- Corrosives in contact with metals may evolve flammable hydrogen gas.
- Containers may explode when heated or if contaminated with water.
Chemical Identity & Physical Properties
Typically colorless to pale yellow liquids with pungent, irritating odor. Fumes heavily in moist air forming dense white vapors of hydrochloric acid.
| Also known as | Chlorosilanes n.o.s.Flammable corrosive chlorosilanesToxic chlorosilane mixturesOrganosilicon chloride compounds |
| Appearance | Typically colorless to pale yellow liquids with pungent, irritating odor. Fumes heavily in moist air forming dense white vapors of hydrochloric acid. |
| Flash Point | -18C to 4C (0F to 39F) depending on specific chlorosilane |
| Boiling Point | 32C to 93C (90F to 199F) depending on specific chlorosilane |
| Vapor Density | 3.0-5.5 (much heavier than air) |
| Water Reactivity | Reacts violently with water producing heat and toxic/corrosive hydrogen chloride gas. Do not use water directly on material. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3362
Extinguishing Media
Dry chemical, CO2, or dry sand only. Do not use water or foam. Use water spray to cool containers from maximum distance.
PPE Requirements
⚠️ Level A required for spill response; SCBA and full chemical protective suit mandatory; material is toxic by inhalation, skin contact, and ingestion
Use SCBA with Level A or B chemical protection; fully encapsulating protection is needed for splash or vapor exposure risk.
Isolation & Evacuation
ERG 155: Isolate spill 50m in all directions. For fire, evacuate 800m downwind. Approach fire from upwind to avoid toxic vapors.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 155).
First Actions for a UN 3362 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate the spill or leak area in all directions; use the ERG guide and shipping papers to set exact distances.
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials, increase downwind precautions when vapor, dust, or runoff hazards are present.
Advertisement
📋 Copy & Share Field Card
UN 3362 — Chlorosilanes, poisonous, corrosive, flaHAZMAT RADIO NOTE — UN 3362
Product: Chlorosilanes, poisonous, corrosive, flammable, n.o.s.
Class 6 / Toxic / ERG 155
PPE: Level A required for spill response; SCBA and full chemical protective suit mandatory; material is toxic by inhalation, skin contact, and ingestion
ISOLATION: ERG 155: Isolate spill 50m in all directions. For fire, evacuate 800m downwind. Approach fire from upwind to avoid toxic vapors.
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 3362 — Chlorosilanes, poisonous, corrosive, flammable, n.o.s.
Class: 6 | Placard: Toxic | ERG Guide: 155
Appearance: Typically colorless to pale yellow liquids with pungent, irritating odor. Fumes heavily in moist air forming dense white vapors of hydrochloric acid.
Water Reactivity: Reacts violently with water producing heat and toxic/corrosive hydrogen chloride gas. Do not use water directly on material.
Extinguishing: Dry chemical, CO2, or dry sand only. Do not use water or foam. Use water spray to cool containers from maximum distance.
PPE: Level A required for spill response; SCBA and full chemical protective suit mandatory; material is toxic by inhalation, skin contact, and ingestion
Isolation: ERG 155: Isolate spill 50m in all directions. For fire, evacuate 800m downwind. Approach fire from upwind to avoid toxic vapors.
— Key Hazards —
• HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
• Vapors form explosive mixtures with air: indoors, outdoors and sewers explosion hazards.
• Most vapors are heavier than air; they spread along the ground and collect in low or confined areas.
— First Actions —
• CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
• 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/chlorosilanes-poisonous-corrosive-flammable-un-3362 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3362 Chlorosilanes, poisonous, corrosive, flammable, n.o.s. Cls6 ERG155 | allfirefighter.com/hazmat/un/chlorosilanes-poisonous-corrosive-flammable-un-3362SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/chlorosilanes-poisonous-corrosive-flammable-un-3362
Advertisement
Frequently Asked Questions about UN 3362
UN 3362 is a chlorosilane n.o.s. entry with toxic and corrosive hazards.
Yes. It can react violently with water or moisture and release corrosive hydrogen chloride fumes.
Yes, this entry includes flammable chlorosilane hazards.
Dry chemical, CO2 or dry sand may be used; avoid direct water application.
SCBA and Level A or B chemical protective clothing are required depending on release severity.
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.