☣️ UN 2968 • CLASS 4
UN 2968 — Maneb preparation, stabilized
Placard: Dangerous When Wet. ERG Guide 135. 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 2968 Quick Details
UN 2968
Product name: Maneb preparation, stabilized
DOT Class: 4
Placard type: Dangerous When Wet
ERG Guide: 135 (check current ERG)
Initial isolation: ERG 135: isolate spill area 25m all directions; if fire, isolate 800m all directions and consider evacuation
Common Hazards of UN 2968
- Flammable/combustible material.
- May ignite on contact with moist air or moisture.
- May burn rapidly with flare-burning effect.
- Some react vigorously or explosively on contact with water.
- Some may decompose explosively when heated or involved in a fire.
- May re-ignite after fire is extinguished.
- Runoff may create fire or explosion hazard.
- Containers may explode when heated.
Chemical Identity & Physical Properties
| Also known as | Manganese ethylenebis(dithiocarbamate)Maneb stabilizedManganese ethylene-1,2-bisdithiocarbamateDithane M-22Manzate |
| CAS Number | 12427-38-2 |
| Appearance | Yellow to brownish-gray powder or granular solid with a slight sulfurous odor. Solid at room temperature. |
| Flash Point | Not applicable (combustible solid, no liquid flash point) |
| Boiling Point | Not applicable (decomposes before boiling) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | May react with moisture producing flammable gases; avoid contact with water in confined spaces |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2968
Extinguishing Media
Dry chemical, dry sand, or carbon dioxide; avoid water spray on bulk material
PPE Requirements
⚠️ Level C minimum with NIOSH-approved respirator; Level B with SCBA if fire involved or confined space
Isolation & Evacuation
ERG 135: isolate spill area 25m all directions; if fire, isolate 800m all directions and consider evacuation
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 135).
First Actions for a UN 2968 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Stay upwind, uphill and/or upstream.
- Keep unauthorized personnel away.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- 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 2968 — Maneb preparation, stabilizedHAZMAT RADIO NOTE — UN 2968
Product: Maneb preparation, stabilized
Class 4 / Dangerous When Wet / ERG 135
PPE: Level C minimum with NIOSH-approved respirator; Level B with SCBA if fire involved or confined space
ISOLATION: ERG 135: isolate spill area 25m all directions; if fire, isolate 800m 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 2968 — Maneb preparation, stabilized
Class: 4 | Placard: Dangerous When Wet | ERG Guide: 135
Appearance: Yellow to brownish-gray powder or granular solid with a slight sulfurous odor. Solid at room temperature.
Water Reactivity: May react with moisture producing flammable gases; avoid contact with water in confined spaces
Extinguishing: Dry chemical, dry sand, or carbon dioxide; avoid water spray on bulk material
PPE: Level C minimum with NIOSH-approved respirator; Level B with SCBA if fire involved or confined space
Isolation: ERG 135: isolate spill area 25m all directions; if fire, isolate 800m all directions and consider evacuation
— Key Hazards —
• Flammable/combustible material.
• May ignite on contact with moist air or moisture.
• May burn rapidly with flare-burning effect.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Stay upwind, uphill and/or upstream.
• Keep unauthorized personnel away.
• Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/2968 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2968 Maneb preparation, stabilized Cls4 ERG135 | allfirefighter.com/hazmat/un/2968SMS / 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/2968
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Frequently Asked Questions about UN 2968
Flammable/combustible material. May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. Some react vigorously or explosively on contact with water. Some may decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished. Runoff may create fire or explosion hazard. Containers may explode when heated.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Stay upwind, uphill and/or upstream. Keep unauthorized personnel away.
Level C minimum with NIOSH-approved respirator; Level B with SCBA if fire involved or confined space
Water reactivity: May react with moisture producing flammable gases; avoid contact with water in confined spaces. Recommended extinguishing: Dry chemical, dry sand, or carbon dioxide; avoid water spray on bulk material.
ERG Guide 135 recommendation: ERG 135: isolate spill area 25m all directions; if fire, isolate 800m all directions and consider evacuation
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 135 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.