☣️ UN 2968 • CLASS 4
Maneb preparation, stabilized
Placard: Dangerous When Wet. 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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Quick details
UN 2968
Class: 4
Placard type: Dangerous When Wet
ERG: Guide 135 (check current ERG)
Isolation: ERG 135: isolate spill area 25m all directions; if fire, isolate 800m all directions and consider evacuation
Chemical & Response Details
| 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 |
| 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 |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- 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.
First actions (field-minded)
- 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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UN 2968 — Maneb preparation, stabilized HAZMAT 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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FAQ
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
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.