☣️ UN 1545 • CLASS 6
Allyl isothiocyanate, stabilized
Placard: Toxic. 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 1545
Class: 6
Placard type: Toxic
ERG: Guide 131 (check current ERG)
Isolation: ERG 131: Initial isolation 60m in all directions; protective action distance 0.3km daytime/0.5km nighttime for small spills, 0.8km daytime/2.4km nighttime for large spills
Chemical & Response Details
| Also known as | AITCAllyl mustard oil3-Isothiocyanato-1-propeneVolatile oil of mustardSynthetic oil of mustard |
| CAS Number | 57-06-7 |
| Appearance | Colorless to pale yellow oily liquid with a pungent, irritating, mustard-like or horseradish odor. Lachrymatory (causes tearing). |
| Flash Point | 46°C (115°F) |
| Boiling Point | 150-152°C (302-306°F) |
| Vapor Density | 3.4 (heavier than air) |
| Water Reactivity | Slightly soluble in water; hydrolyzes slowly forming mustard oils and other compounds |
| Extinguishing | Alcohol-resistant foam, CO2, dry chemical powder, water spray for cooling only |
| PPE | ⚠️ Level B minimum with full-face respirator or SCBA; chemically resistant suit, gloves, and boots required due to severe skin/eye hazard |
| Isolation | ERG 131: Initial isolation 60m in all directions; protective action distance 0.3km daytime/0.5km nighttime for small spills, 0.8km daytime/2.4km nighttime for large spills |
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 1545 — Allyl isothiocyanate, stabilized HAZMAT RADIO NOTE — UN 1545
Product: Allyl isothiocyanate, stabilized
Class 6 / Toxic / ERG 131
PPE: Level B minimum with full-face respirator or SCBA; chemically resistant suit, gloves, and boots required due to severe skin/eye hazard
ISOLATION: ERG 131: Initial isolation 60m in all directions; protective action distance 0.3km daytime/0.5km nighttime for small spills, 0.8km daytime/2.4km nighttime for large spills
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 1545 — Allyl isothiocyanate, stabilized
Class: 6 | Placard: Toxic | ERG Guide: 131
Appearance: Colorless to pale yellow oily liquid with a pungent, irritating, mustard-like or horseradish odor. Lachrymatory (causes tearing).
Water Reactivity: Slightly soluble in water; hydrolyzes slowly forming mustard oils and other compounds
Extinguishing: Alcohol-resistant foam, CO2, dry chemical powder, water spray for cooling only
PPE: Level B minimum with full-face respirator or SCBA; chemically resistant suit, gloves, and boots required due to severe skin/eye hazard
Isolation: ERG 131: Initial isolation 60m in all directions; protective action distance 0.3km daytime/0.5km nighttime for small spills, 0.8km daytime/2.4km nighttime for large spills
— 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/1545 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1545 Allyl isothiocyanate, stabilized Cls6 ERG131 | allfirefighter.com/hazmat/un/1545SMS / 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/1545
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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 B minimum with full-face respirator or SCBA; chemically resistant suit, gloves, and boots required due to severe skin/eye hazard
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.