☣️ UN 0375 • CLASS 1
Sounding devices, explosive
Placard: Explosive 1.2D. 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 0375
Class: 1
Placard type: Explosive 1.2D
ERG: Guide 112 (check current ERG)
Isolation: ERG 112: isolate 500m in all directions; if fire or explosion involved, evacuate 1600m in all directions; treat as explosive hazard requiring EOD response
Chemical & Response Details
| Also known as | Explosive sounding devicesMarine signal chargesSeismic exploration chargesAcoustic signal cartridges |
| Appearance | Typically metal or plastic cylindrical devices containing explosive charges designed to produce acoustic signals underwater or in the air. May vary in size from small cartridges to larger canister-type devices. |
| Flash Point | Not applicable (explosive device) |
| Boiling Point | Not applicable (explosive device) |
| Vapor Density | Not applicable (explosive device) |
| Water Reactivity | No significant reaction with water, but device may be water-activated or water-resistant depending on design |
| Extinguishing | Do not use water or foam; use dry chemical or sand at safe distance only after expert consultation |
| PPE | ⚠️ Minimum Level B with blast-resistant protection; SCBA required; maintain maximum safe distance; full explosive ordnance disposal (EOD) protocols required |
| Isolation | ERG 112: isolate 500m in all directions; if fire or explosion involved, evacuate 1600m in all directions; treat as explosive hazard requiring EOD response |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Projection and fragmentation hazard on initiation.
- Blast overpressure in immediate area.
- Sensitive to heat, shock, or electrical current.
- May initiate other explosives in proximity.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper.
- Isolate minimum 500 meters; stage upwind and uphill.
- Request Hazmat + law enforcement immediately.
- Control ignition sources; deny unauthorized entry.
- Do not approach — projectile/fragmentation hazard.
- Consult current ERG Guide 112 and follow SOP/SOG.
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UN 0375 — Sounding devices, explosive HAZMAT RADIO NOTE — UN 0375
Product: Sounding devices, explosive
Class 1 / Explosive 1.2D / ERG 112
PPE: Minimum Level B with blast-resistant protection; SCBA required; maintain maximum safe distance; full explosive ordnance disposal (EOD) protocols required
ISOLATION: ERG 112: isolate 500m in all directions; if fire or explosion involved, evacuate 1600m in all directions; treat as explosive hazard requiring EOD response
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 0375 — Sounding devices, explosive
Class: 1 | Placard: Explosive 1.2D | ERG Guide: 112
Appearance: Typically metal or plastic cylindrical devices containing explosive charges designed to produce acoustic signals underwater or in the air. May vary in size from small cartridges to larger canister-type devices.
Water Reactivity: No significant reaction with water, but device may be water-activated or water-resistant depending on design
Extinguishing: Do not use water or foam; use dry chemical or sand at safe distance only after expert consultation
PPE: Minimum Level B with blast-resistant protection; SCBA required; maintain maximum safe distance; full explosive ordnance disposal (EOD) protocols required
Isolation: ERG 112: isolate 500m in all directions; if fire or explosion involved, evacuate 1600m in all directions; treat as explosive hazard requiring EOD response
— Key Hazards —
• Projection and fragmentation hazard on initiation.
• Blast overpressure in immediate area.
• Sensitive to heat, shock, or electrical current.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper.
• Isolate minimum 500 meters; stage upwind and uphill.
• Request Hazmat + law enforcement immediately.
• Control ignition sources; deny unauthorized entry.
SOURCE: allfirefighter.com/hazmat/un/0375 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0375 Sounding devices, explosive Cls1 ERG112 | allfirefighter.com/hazmat/un/0375SMS / 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/0375
Related UN numbers (same class)
Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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FAQ
Projection and fragmentation hazard on initiation. Blast overpressure in immediate area. Sensitive to heat, shock, or electrical current. May initiate other explosives in proximity.
CALL 911. Then call emergency response telephone number on shipping paper. Isolate minimum 500 meters; stage upwind and uphill. Request Hazmat + law enforcement immediately.
Minimum Level B with blast-resistant protection; SCBA required; maintain maximum safe distance; full explosive ordnance disposal (EOD) protocols required
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 112 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.