☣️ UN 3275 • CLASS 6
UN 3275 — Nitriles, poisonous, flammable, n.o.s.
Placard: Toxic. ERG Guide 131. 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 3275 Quick Details
UN 3275
Product name: Nitriles, poisonous, flammable, n.o.s.
DOT Class: 6
Placard type: Toxic
ERG Guide: 131 (check current ERG)
Initial isolation: ERG 131: isolate spill 50m all directions; evacuate 800m downwind if tank/rail car involved in fire
Common Hazards of UN 3275
- 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.
Chemical Identity & Physical Properties
| Also known as | Nitriles N.O.S.Poisonous nitrilesFlammable nitrilesToxic nitrile compounds |
| Appearance | Variable appearance depending on specific nitrile; typically colorless to pale yellow liquids with characteristic pungent or almond-like odor at room temperature. |
| Flash Point | Variable, typically 23-61°C (73-142°F) for flammable nitriles |
| Boiling Point | Variable depending on specific compound, typically 77-200°C (170-392°F) |
| Vapor Density | Heavier than air (typically 2-4 times air density) |
| Water Reactivity | Generally stable in water but may hydrolyze slowly; some nitriles may react with strong acids or bases |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3275
Extinguishing Media
Alcohol-resistant foam, CO2, dry chemical; water spray for cooling only
PPE Requirements
⚠️ Level A or B required; SCBA mandatory; impervious chemical protective clothing; nitrile or butyl rubber gloves; face shield
Isolation & Evacuation
ERG 131: isolate spill 50m all directions; evacuate 800m downwind if tank/rail car involved in fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 131).
First Actions for a UN 3275 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.
- 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 3275 — Nitriles, poisonous, flammable, n.o.s.HAZMAT RADIO NOTE — UN 3275
Product: Nitriles, poisonous, flammable, n.o.s.
Class 6 / Toxic / ERG 131
PPE: Level A or B required; SCBA mandatory; impervious chemical protective clothing; nitrile or butyl rubber gloves; face shield
ISOLATION: ERG 131: isolate spill 50m all directions; evacuate 800m downwind if tank/rail car involved in fire
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 3275 — Nitriles, poisonous, flammable, n.o.s.
Class: 6 | Placard: Toxic | ERG Guide: 131
Appearance: Variable appearance depending on specific nitrile; typically colorless to pale yellow liquids with characteristic pungent or almond-like odor at room temperature.
Water Reactivity: Generally stable in water but may hydrolyze slowly; some nitriles may react with strong acids or bases
Extinguishing: Alcohol-resistant foam, CO2, dry chemical; water spray for cooling only
PPE: Level A or B required; SCBA mandatory; impervious chemical protective clothing; nitrile or butyl rubber gloves; face shield
Isolation: ERG 131: isolate spill 50m all directions; evacuate 800m downwind if tank/rail car involved in fire
— 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/3275 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3275 Nitriles, poisonous, flammable, n.o.s. Cls6 ERG131 | allfirefighter.com/hazmat/un/3275SMS / 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/3275
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Frequently Asked Questions about UN 3275
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 required; SCBA mandatory; impervious chemical protective clothing; nitrile or butyl rubber gloves; face shield
Water reactivity: Generally stable in water but may hydrolyze slowly; some nitriles may react with strong acids or bases. Recommended extinguishing: Alcohol-resistant foam, CO2, dry chemical; water spray for cooling only.
ERG Guide 131 recommendation: ERG 131: isolate spill 50m all directions; evacuate 800m downwind if tank/rail car involved in fire
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.