☣️ UN 0442 • CLASS 1

UN 0442 — Charges, explosive, commercial, without detonator

Placard: Explosive 1.1D. ERG Guide 112. 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.

Charges, explosive, commercial, without detonator are solid explosive compositions that can detonate simultaneously, posing a significant mass explosion hazard. They are typically tan, gray, or white in color and may have a mild chemical or ammonia-like odor.

Hazard overview: The explosion of these charges can cause severe blast overpressure and fragmentation, resulting in significant damage and injury. The entire load may detonate simultaneously, making it a highly hazardous situation.

Response guidance: In the event of an emergency, do not extinguish the fire, evacuate the area, and allow it to burn under controlled conditions. If water is used, it should be from a distance and only if absolutely necessary.

UN 0442 Quick Details

UN 0442

Product name: Charges, explosive, commercial, without detonator

DOT Class: 1

Placard type: Explosive 1.1D

ERG Guide: 112 (check current ERG)

Initial isolation: ERG 112: Isolate 500m (1600 ft) in all directions; evacuate 800m (2500 ft) if fire or cargo involved; consider 1600m+ (1 mile) for large quantities

Common Hazards of UN 0442

Mass explosion hazard — entire load may detonate simultaneously.
Severe blast overpressure and fragmentation.
Sensitive to heat, shock, and friction.
Secondary fire and debris hazard.

Chemical Identity & Physical Properties

These compositions are typically solid and may have a mild chemical or ammonia-like odor, depending on the composition.

Appearance	Solid explosive compositions in various forms (cartridges, blocks, sheets) typically tan, gray, or white in color. May have mild chemical or ammonia-like odor depending on composition.
Flash Point	Not applicable (explosive solid)
Boiling Point	Not applicable (decomposes/detonates)
Vapor Density	Not applicable (solid)
Water Reactivity	Generally stable with water, but moisture may affect sensitivity and performance of some explosive formulations

Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.

Fireground Response Guidance — UN 0442

Extinguishing Media

DO NOT extinguish fire; evacuate area and allow to burn under controlled conditions. Water from distance only if absolutely necessary

PPE Requirements

⚠️ Full structural firefighting gear with SCBA; Level A with blast-resistant protection if entry required; maintain maximum safe distance

Emergency responders should wear full structural firefighting gear with SCBA and maintain a maximum safe distance.

Isolation & Evacuation

ERG 112: Isolate 500m (1600 ft) in all directions; evacuate 800m (2500 ft) if fire or cargo involved; consider 1600m+ (1 mile) for large quantities

Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 112).

First Actions for a UN 0442 Incident

CALL 911. Then call emergency response telephone number on shipping paper.
Establish large isolation zone — minimum 500 meters in all directions.
Stage upwind, uphill; limit personnel to essential responders only.
Request Hazmat + law enforcement + additional resources immediately.
Do not fight fire — evacuate and isolate; let burn if no life safety risk.
Protect exposures only if safe and directed by command.
Consult current ERG Guide 112 and follow SOP/SOG.

📋 Copy & Share Field Card

UN 0442 — Charges, explosive, commercial, without

HAZMAT RADIO NOTE — UN 0442 Product: Charges, explosive, commercial, without detonator Class 1 / Explosive 1.1D / ERG 112 PPE: Full structural firefighting gear with SCBA; Level A with blast-resistant protection if entry required; maintain maximum safe distance ISOLATION: ERG 112: Isolate 500m (1600 ft) in all directions; evacuate 800m (2500 ft) if fire or cargo involved; consider 1600m+ (1 mile) for large quantities ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO

Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.

SMS WhatsApp

=== IC HAZMAT BRIEFING === UN 0442 — Charges, explosive, commercial, without detonator Class: 1 | Placard: Explosive 1.1D | ERG Guide: 112 Appearance: Solid explosive compositions in various forms (cartridges, blocks, sheets) typically tan, gray, or white in color. May have mild chemical or ammonia-like odor depending on composition. Water Reactivity: Generally stable with water, but moisture may affect sensitivity and performance of some explosive formulations Extinguishing: DO NOT extinguish fire; evacuate area and allow to burn under controlled conditions. Water from distance only if absolutely necessary PPE: Full structural firefighting gear with SCBA; Level A with blast-resistant protection if entry required; maintain maximum safe distance Isolation: ERG 112: Isolate 500m (1600 ft) in all directions; evacuate 800m (2500 ft) if fire or cargo involved; consider 1600m+ (1 mile) for large quantities — Key Hazards — • Mass explosion hazard — entire load may detonate simultaneously. • Severe blast overpressure and fragmentation. • Sensitive to heat, shock, and friction. — First Actions — • CALL 911. Then call emergency response telephone number on shipping paper. • Establish large isolation zone — minimum 500 meters in all directions. • Stage upwind, uphill; limit personnel to essential responders only. • Request Hazmat + law enforcement + additional resources immediately. SOURCE: allfirefighter.com/hazmat/un/0442 | Always use current ERG + SOP/SOGIC BRIEFING

Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.

SMS (short)

UN0442 Charges, explosive, commercial, without detonator Cls1 ERG112 | allfirefighter.com/hazmat/un/0442SMS / 160 CHAR

Use for: Quick text to command or incoming units. Fits in a single SMS.

Open in Messages WhatsApp

⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/charges-explosive-commercial-without-un-0442

Related UN Numbers in Class 1

Open Class Guide →Hazmat Hub →

UN 0004 UN 0012 UN 0027 UN 0028 UN 0030 UN 0033 UN 0042 UN 0043 UN 0048 UN 0055 UN 0056 UN 0058

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Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.

Frequently Asked Questions about UN 0442

Yes, some explosive formulations of UN 0442 may be sensitive to moisture, which can affect their performance.

The isolation distance for UN 0442 is 500m (1600 ft) in all directions, and 800m (2500 ft) if fire or cargo is involved.

Do not approach the fire, evacuate the area, and allow it to burn under controlled conditions, using water from a distance only if absolutely necessary.

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.