☣️ UN 1455 • CLASS 5
UN 1455 — Calcium perchlorate
Placard: Oxidizer. ERG Guide 140. 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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UN 1455 Quick Details
UN 1455
Product name: Calcium perchlorate
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 140 (check current ERG)
Initial isolation: ERG 140: Isolate spill or leak area immediately for at least 50m in all directions. If tank/railcar is involved in fire, isolate 800m in all directions and consider initial evacuation.
Common Hazards of UN 1455
- These substances will accelerate burning when involved in a fire.
- Some may decompose explosively when heated or involved in a fire.
- May explode from heat or contamination.
- Some will react explosively with hydrocarbons (fuels).
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
- Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or
Chemical Identity & Physical Properties
| Also known as | Calcium perchlorate tetrahydratePerchloric acid calcium saltCalcium diperchlorate |
| CAS Number | 13477-36-6 |
| Appearance | White to yellowish crystalline solid or granules, typically odorless. Hygroscopic (absorbs moisture from air). Usually encountered as the tetrahydrate form. |
| Flash Point | Not applicable (oxidizing solid, not flammable itself but intensifies fire) |
| Boiling Point | Not applicable (decomposes above 270C/518F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Soluble in water, no violent reaction. However, solution is a strong oxidizer. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1455
Extinguishing Media
Water spray, dry chemical, or CO2. Avoid organic materials and combustibles near fire.
PPE Requirements
⚠️ Level B minimum in spill/fire situations; full structural firefighting gear with SCBA for fire response. Avoid contact with combustible materials.
Isolation & Evacuation
ERG 140: Isolate spill or leak area immediately for at least 50m in all directions. If tank/railcar is involved in fire, isolate 800m in all directions and consider initial evacuation.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 140).
First Actions for a UN 1455 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 in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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UN 1455 — Calcium perchlorateHAZMAT RADIO NOTE — UN 1455
Product: Calcium perchlorate
Class 5 / Oxidizer / ERG 140
PPE: Level B minimum in spill/fire situations; full structural firefighting gear with SCBA for fire response. Avoid contact with combustible materials.
ISOLATION: ERG 140: Isolate spill or leak area immediately for at least 50m in all directions. If tank/railcar is involved in fire, isolate 800m in all directions and consider initial 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 1455 — Calcium perchlorate
Class: 5 | Placard: Oxidizer | ERG Guide: 140
Appearance: White to yellowish crystalline solid or granules, typically odorless. Hygroscopic (absorbs moisture from air). Usually encountered as the tetrahydrate form.
Water Reactivity: Soluble in water, no violent reaction. However, solution is a strong oxidizer.
Extinguishing: Water spray, dry chemical, or CO2. Avoid organic materials and combustibles near fire.
PPE: Level B minimum in spill/fire situations; full structural firefighting gear with SCBA for fire response. Avoid contact with combustible materials.
Isolation: ERG 140: Isolate spill or leak area immediately for at least 50m in all directions. If tank/railcar is involved in fire, isolate 800m in all directions and consider initial evacuation.
— Key Hazards —
• These substances will accelerate burning when involved in a fire.
• Some may decompose explosively when heated or involved in a fire.
• May explode from heat or contamination.
— 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/1455 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1455 Calcium perchlorate Cls5 ERG140 | ERG 140: Isolate spill or leak area immediately for at least 50m in all directio | allfirefighter.com/hazmat/un/1455SMS / 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/1455
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Frequently Asked Questions about UN 1455
These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire. May explode from heat or contamination. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard. Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or
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 B minimum in spill/fire situations; full structural firefighting gear with SCBA for fire response. Avoid contact with combustible materials.
Water reactivity: Soluble in water, no violent reaction. However, solution is a strong oxidizer.. Recommended extinguishing: Water spray, dry chemical, or CO2. Avoid organic materials and combustibles near fire..
ERG Guide 140 recommendation: ERG 140: Isolate spill or leak area immediately for at least 50m in all directions. If tank/railcar is involved in fire, isolate 800m in all directions and consider initial evacuation.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 140 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.