☣️ UN 1992 • CLASS 3
Flammable liquid, poisonous, n.o.s.
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.
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Quick details
UN 1992
Class: 3
Placard type: Flammable
ERG: Guide 131 (check current ERG)
Isolation: ERG 131: Isolate spill 50m (150ft) all directions; if tank/railcar involved in fire, isolate 800m (0.5 miles) in all directions and consider evacuation
Chemical & Response Details
| Also known as | Flammable liquid, toxic, n.o.s.Poisonous flammable liquidToxic flammable liquid NOSClass 3 PG I/II/III toxic liquid |
| Appearance | Variable appearance depending on specific substance; typically a liquid at room temperature with potentially irritating or toxic vapors. Color and odor vary widely as this is a generic shipping classification covering multiple chemicals. |
| Flash Point | Below 60.5C (141F) for Class 3 flammable liquids; exact value depends on specific substance |
| Boiling Point | Variable depending on specific chemical; generally ranges from 50C to 200C (122F to 392F) |
| Vapor Density | Typically >1 (heavier than air) for most flammable organic liquids; specific value depends on substance |
| Water Reactivity | Generally no violent reaction with water, though some specific substances may react; consult specific chemical data |
| Extinguishing | Alcohol-resistant AFFF foam, CO2, dry chemical, or water spray; foam may be ineffective for some substances |
| PPE | ⚠️ Level A or B with SCBA required due to toxic inhalation hazard; chemical-resistant suit, gloves, and boots mandatory; avoid all skin contact |
| Isolation | ERG 131: Isolate spill 50m (150ft) all directions; if tank/railcar involved in fire, isolate 800m (0.5 miles) in all directions and consider evacuation |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- TOXIC; may be fatal if inhaled, ingested or absorbed through skin.
- Inhalation or contact with some of these materials will irritate or burn skin and eyes.
- Methyl chloroacetate (UN2295) is an eye irritant/lachrymator (causes flow of tears).
- Fire will produce irritating, corrosive and/or toxic gases.
- Vapors may cause dizziness or asphyxiation, especially when in closed or confined areas.
- Runoff from fire control or dilution water may cause environmental contamination.
- HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
- Vapors may form explosive mixtures with air.
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 for at least 50 meters (150 feet) in all directions.
- 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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UN 1992 — Flammable liquid, poisonous, n.o.s. HAZMAT RADIO NOTE — UN 1992
Product: Flammable liquid, poisonous, n.o.s.
Class 3 / Flammable / ERG 131
PPE: Level A or B with SCBA required due to toxic inhalation hazard; chemical-resistant suit, gloves, and boots mandatory; avoid all skin contact
ISOLATION: ERG 131: Isolate spill 50m (150ft) all directions; if tank/railcar involved in fire, isolate 800m (0.5 miles) in 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 1992 — Flammable liquid, poisonous, n.o.s.
Class: 3 | Placard: Flammable | ERG Guide: 131
Appearance: Variable appearance depending on specific substance; typically a liquid at room temperature with potentially irritating or toxic vapors. Color and odor vary widely as this is a generic shipping classification covering multiple chemicals.
Water Reactivity: Generally no violent reaction with water, though some specific substances may react; consult specific chemical data
Extinguishing: Alcohol-resistant AFFF foam, CO2, dry chemical, or water spray; foam may be ineffective for some substances
PPE: Level A or B with SCBA required due to toxic inhalation hazard; chemical-resistant suit, gloves, and boots mandatory; avoid all skin contact
Isolation: ERG 131: Isolate spill 50m (150ft) all directions; if tank/railcar involved in fire, isolate 800m (0.5 miles) in all directions and consider evacuation
— Key Hazards —
• TOXIC; may be fatal if inhaled, ingested or absorbed through skin.
• Inhalation or contact with some of these materials will irritate or burn skin and eyes.
• Methyl chloroacetate (UN2295) is an eye irritant/lachrymator (causes flow of tears).
— 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/1992 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1992 Flammable liquid, poisonous, n.o.s. Cls3 ERG131 | allfirefighter.com/hazmat/un/1992SMS / 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/1992
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FAQ
TOXIC; may be fatal if inhaled, ingested or absorbed through skin. Inhalation or contact with some of these materials will irritate or burn skin and eyes. Methyl chloroacetate (UN2295) is an eye irritant/lachrymator (causes flow of tears). Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or asphyxiation, especially when in closed or confined areas. Runoff from fire control or dilution water may cause environmental contamination. HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air.
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 A or B with SCBA required due to toxic inhalation hazard; chemical-resistant suit, gloves, and boots mandatory; avoid all skin contact
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 131 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.