☣️ UN 1131 • CLASS 3
UN 1131 — Carbon disulphide
Placard: Flammable. 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 1131 Quick Details
UN 1131
Product name: Carbon disulphide
DOT Class: 3
Placard type: Flammable
ERG Guide: 131 (check current ERG)
Initial isolation: ERG 131: initially isolate 50m all directions; if tank/railcar involved in fire, isolate 800m and consider evacuation for 1600m downwind
Common Hazards of UN 1131
- 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 | Carbon bisulfideCarbon bisulphideDithiocarbonic anhydrideCS2 |
| CAS Number | 75-15-0 |
| Appearance | Colorless to faint yellow liquid with a sweet, aromatic odor when pure; commercial grades have a foul, rotten-egg odor due to impurities. Highly volatile at room temperature. |
| Flash Point | -30°C (-22°F) |
| Boiling Point | 46°C (115°F) |
| Vapor Density | 2.6 (heavier than air) |
| Water Reactivity | Insoluble in water; no significant reaction with water |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1131
Extinguishing Media
Dry chemical, CO2, or alcohol-resistant foam; water spray for cooling only
PPE Requirements
⚠️ Level A or B required; SCBA mandatory; full chemical-resistant suit due to severe skin absorption hazard and neurotoxicity
Isolation & Evacuation
ERG 131: initially isolate 50m all directions; if tank/railcar involved in fire, isolate 800m and consider evacuation for 1600m downwind
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 131).
First Actions for a UN 1131 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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📋 Copy & Share Field Card
UN 1131 — Carbon disulphideHAZMAT RADIO NOTE — UN 1131
Product: Carbon disulphide
Class 3 / Flammable / ERG 131
PPE: Level A or B required; SCBA mandatory; full chemical-resistant suit due to severe skin absorption hazard and neurotoxicity
ISOLATION: ERG 131: initially isolate 50m all directions; if tank/railcar involved in fire, isolate 800m and consider evacuation for 1600m downwind
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 1131 — Carbon disulphide
Class: 3 | Placard: Flammable | ERG Guide: 131
Appearance: Colorless to faint yellow liquid with a sweet, aromatic odor when pure; commercial grades have a foul, rotten-egg odor due to impurities. Highly volatile at room temperature.
Water Reactivity: Insoluble in water; no significant reaction with water
Extinguishing: Dry chemical, CO2, or alcohol-resistant foam; water spray for cooling only
PPE: Level A or B required; SCBA mandatory; full chemical-resistant suit due to severe skin absorption hazard and neurotoxicity
Isolation: ERG 131: initially isolate 50m all directions; if tank/railcar involved in fire, isolate 800m and consider evacuation for 1600m downwind
— 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/1131 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1131 Carbon disulphide Cls3 ERG131 | ERG 131: initially isolate 50m all directions; if tank/railcar involved in fire, | allfirefighter.com/hazmat/un/1131SMS / 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/1131
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Frequently Asked Questions about UN 1131
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; full chemical-resistant suit due to severe skin absorption hazard and neurotoxicity
Water reactivity: Insoluble in water; no significant reaction with water. Recommended extinguishing: Dry chemical, CO2, or alcohol-resistant foam; water spray for cooling only.
ERG Guide 131 recommendation: ERG 131: initially isolate 50m all directions; if tank/railcar involved in fire, isolate 800m and consider evacuation for 1600m downwind
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.