☣️ UN 1222 • CLASS 3

UN 1222 — Isopropyl nitrate

Placard: Flammable. ERG Guide 130. 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.

Isopropyl nitrate is a highly volatile and flammable liquid with a sweet, ethereal odor. It is easily ignited by heat, sparks, or flames, and its vapors can form explosive mixtures with air.

Hazard overview: Isopropyl nitrate is highly flammable and can be ignited by heat, sparks, or flames, and its vapors may form explosive mixtures with air. Prolonged exposure to its vapors can also be hazardous to human health.

Response guidance: In case of a spill or leak, evacuate the area immediately and isolate the spill to prevent ignition. Emergency responders should wear Level B minimum protective equipment, including SCBA and full face protection, to prevent exposure to volatile vapors.

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UN 1222 Quick Details

UN 1222
Product name: Isopropyl nitrate
DOT Class: 3
Placard type: Flammable
ERG Guide: 130 (check current ERG)
Initial isolation: ERG 130: isolate spill 50m all directions; for fire isolate 800m in all directions, evacuate 800m downwind

Common Hazards of UN 1222

  • 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

Isopropyl nitrate is a colorless to pale yellow liquid with a sweet, ethereal odor, and it is highly volatile and flammable at room temperature.

Also known as2-Propyl nitrateNitric acid isopropyl esterIsopropanol nitrateIPN
CAS Number1712-64-7
AppearanceColorless to pale yellow liquid with a sweet, ethereal odor. Volatile and highly flammable at room temperature.
Flash Point-9C (16F)
Boiling Point102C (216F)
Vapor Density3.7 (heavier than air)
Water ReactivitySlightly soluble in water; no violent reaction but may hydrolyze slowly
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.

Fireground Response Guidance — UN 1222

Extinguishing Media

Alcohol-resistant foam, CO2, dry chemical; water spray for cooling only

PPE Requirements

⚠️ Level B minimum; SCBA required; full face protection due to volatile vapors and low flash point

Emergency responders should wear Level B minimum protective equipment, including SCBA and full face protection, to prevent exposure to volatile vapors and low flash point.

Isolation & Evacuation

ERG 130: isolate spill 50m all directions; for fire isolate 800m in all directions, evacuate 800m downwind
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 130).

First Actions for a UN 1222 Incident

  • 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).
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📋 Copy & Share Field Card

UN 1222 — Isopropyl nitrate
HAZMAT RADIO NOTE — UN 1222 Product: Isopropyl nitrate Class 3 / Flammable / ERG 130 PPE: Level B minimum; SCBA required; full face protection due to volatile vapors and low flash point ISOLATION: ERG 130: isolate spill 50m all directions; for fire isolate 800m in all directions, evacuate 800m downwind ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO

Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.

SMS WhatsApp
=== IC HAZMAT BRIEFING === UN 1222 — Isopropyl nitrate Class: 3 | Placard: Flammable | ERG Guide: 130 Appearance: Colorless to pale yellow liquid with a sweet, ethereal odor. Volatile and highly flammable at room temperature. Water Reactivity: Slightly soluble in water; no violent reaction but may hydrolyze slowly Extinguishing: Alcohol-resistant foam, CO2, dry chemical; water spray for cooling only PPE: Level B minimum; SCBA required; full face protection due to volatile vapors and low flash point Isolation: ERG 130: isolate spill 50m all directions; for fire isolate 800m in all directions, evacuate 800m downwind — 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 — • 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. SOURCE: allfirefighter.com/hazmat/un/1222 | Always use current ERG + SOP/SOGIC BRIEFING

Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.

SMS (short)
UN1222 Isopropyl nitrate Cls3 ERG130 | ERG 130: isolate spill 50m all directions; for fire isolate 800m in all directio | allfirefighter.com/hazmat/un/1222SMS / 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/isopropyl-nitrate-un-1222

Related UN Numbers in Class 3

Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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Frequently Asked Questions about UN 1222

Yes, UN 1222 Isopropyl nitrate is highly flammable and can be easily ignited by heat, sparks, or flames.

The flash point of UN 1222 Isopropyl nitrate is very low, making it highly volatile and flammable at room temperature.

In case of a spill or leak, evacuate the area immediately and isolate the spill to prevent ignition, and wear Level B minimum protective equipment, including SCBA and full face protection.
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.