☣️ UN 1481 • CLASS 5

UN 1481 — Perchlorates, inorganic, n.o.s.

Placard: Oxidizer. ERG Guide 140. 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.

UN 1481 is Perchlorates, inorganic, n.o.s., a Class 5 oxidizer assigned to ERG Guide 140. It can intensify fire and may react violently with fuels, organics, acids or reducing agents.

Hazard overview: UN 1481 presents oxidizer, decomposition and contamination hazards. Heat, fuels, organics, acids or reducing agents can increase fire, explosion or toxic gas risk depending on the exact salt or mixture.

Response guidance: For a UN 1481 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 140. Establish incident command, isolate the area, stay upwind, keep fuels and organics away, avoid contaminated absorbents and choose extinguishing or spill-control actions based on ERG, SDS and local SOP.

Firefighter training notes: Training for UN 1481 should emphasize oxidizer fire acceleration, chlorine/chlorine dioxide-type decomposition gases where applicable, incompatibility with fuels, acids and organics, dust control and runoff management. Use ERG 140, SDS and local SOP.

Regulatory context: Perchlorates, inorganic, n.o.s. is regulated as a hazardous material for transportation and emergency response purposes. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by formulation, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, facility documents and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.

Storage & handling: Perchlorates, inorganic, n.o.s. should be stored in compatible oxidizer storage away from acids, fuels, organic materials, reducing agents, ammonia compounds where incompatible, heat and contamination. Keep containers dry, closed, clearly labeled and separated from combustible packaging or spilled residues.

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UN 1481 Quick Details

UN 1481
Product name: Perchlorates, inorganic, n.o.s.
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 140 (check current ERG)
Initial isolation: ERG 140: isolate spill/leak 50m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation 1600m downwind

Common Hazards of UN 1481

  • OXIDIZER: may intensify fire and accelerate burning of combustible materials.
  • Heat, friction, contamination or confinement may increase decomposition or explosion risk.
  • May ignite combustibles such as wood, paper, oil, clothing, packaging or contaminated absorbents.
  • Chlorate, chlorite, bromate or hypochlorite mixtures may react violently with fuels, organics, acids, sulfur, phosphorus or reducing agents.
  • Containers may rupture or explode when heated.
  • Fire may produce irritating and/or toxic gases.
  • Runoff may spread oxidizing material and create fire, explosion or environmental hazards.
  • Dust, solution or decomposition products may irritate or injure eyes, skin or respiratory tissue.

Chemical Identity & Physical Properties

White to colorless crystalline solids or powders, odorless. Vary in appearance depending on the specific metal cation. Most are hygroscopic and deliquescent.

Also known asPerchlorate saltsMetal perchloratesInorganic perchlorate compoundsPerchlorates NOS
AppearanceWhite to colorless crystalline solids or powders, odorless. Vary in appearance depending on the specific metal cation. Most are hygroscopic and deliquescent.
Flash PointNot applicable (inorganic oxidizer)
Boiling PointNot applicable (decomposes before boiling)
Vapor DensityNot applicable (solid)
Water ReactivitySoluble in water; dissolution may generate heat. Contaminated solutions can become unstable.
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.

Fireground Response Guidance — UN 1481

Extinguishing Media

Use water spray or flooding water from a protected position when ERG, SDS and incident command confirm it is appropriate. Keep the material away from fuels, organics and contaminated absorbents; avoid foam, dry chemical or CO2 when they add incompatible contamination or fail to control oxidizer-supported fire.

PPE Requirements

⚠️ Level B minimum with SCBA during fire or contamination scenarios; full face protection; chemical-resistant gloves and clothing

Use positive-pressure SCBA for fire, dust, decomposition or confined-space exposure. Chemical-resistant gloves, eye/face protection and protective clothing should be selected from SDS; avoid dust inhalation and contaminated runoff.

Isolation & Evacuation

ERG 140: isolate spill/leak 50m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation 1600m downwind
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 140).

First Actions for a UN 1481 Incident

  • CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
  • Keep unauthorized personnel away.
  • Stay upwind, uphill and/or upstream.
  • Keep combustibles, fuels, organics, reducing agents and contaminated materials away from the spill.
  • Do not touch or walk through spilled material unless properly trained and wearing appropriate protective equipment.
  • Avoid creating dust clouds and prevent runoff from contacting combustibles, drains or incompatible materials when possible.
  • Ventilate closed spaces before entering, but only if properly trained, equipped and authorized by incident command.
  • Isolate the spill or fire area and expand the perimeter if large quantities, contamination, heating or container involvement are present.
  • Use ERG Guide 140, shipping papers, SDS and local SOP for protective actions and entry decisions.
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📋 Copy & Share Field Card

UN 1481 — Perchlorates, inorganic, n.o.s.
HAZMAT RADIO NOTE — UN 1481 Product: Perchlorates, inorganic, n.o.s. Class 5 / Oxidizer / ERG 140 PPE: Level B minimum with SCBA during fire or contamination scenarios; full face protection; chemical-resistant gloves and clothing ISOLATION: ERG 140: isolate spill/leak 50m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation 1600m downwind 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 1481 — Perchlorates, inorganic, n.o.s. Class: 5 | Placard: Oxidizer | ERG Guide: 140 Appearance: White to colorless crystalline solids or powders, odorless. Vary in appearance depending on the specific metal cation. Most are hygroscopic and deliquescent. Water Reactivity: Soluble in water; dissolution may generate heat. Contaminated solutions can become unstable. Extinguishing: Use water spray or flooding water from a protected position when ERG, SDS and incident command confirm it is appropriate. Keep the material away from fuels, organics and contaminated absorbents; avoid foam, dry chemical or CO2 when they add incompatible contamination or fail to control oxidizer-supported fire. PPE: Level B minimum with SCBA during fire or contamination scenarios; full face protection; chemical-resistant gloves and clothing Isolation: ERG 140: isolate spill/leak 50m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation 1600m downwind — Key Hazards — • OXIDIZER: may intensify fire and accelerate burning of combustible materials. • Heat, friction, contamination or confinement may increase decomposition or explosion risk. • May ignite combustibles such as wood, paper, oil, clothing, packaging or contaminated absorbents. — First Actions — • CALL 911. Then call the emergency response telephone number on the shipping paper, if available. • Keep unauthorized personnel away. • Stay upwind, uphill and/or upstream. • Keep combustibles, fuels, organics, reducing agents and contaminated materials away from the spill. SOURCE: allfirefighter.com/hazmat/un/perchlorates-inorganic-n-o-un-1481 | Always use current ERG + SOP/SOGIC BRIEFING

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

SMS (short)
UN1481 Perchlorates, inorganic, n.o.s. Cls5 ERG140 | allfirefighter.com/hazmat/un/perchlorates-inorganic-n-o-un-1481SMS / 160 CHAR

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

⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/perchlorates-inorganic-n-o-un-1481

Related UN Numbers in Class 5

Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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Frequently Asked Questions about UN 1481

UN 1481 is Perchlorates, inorganic, n.o.s., a Class 5 oxidizer assigned to ERG Guide 140.

No. It is not normally flammable, but it can strongly accelerate burning of other materials.

ERG Guide 140 applies to UN 1481 for initial isolation, protective actions and first response guidance.

UN 1481 presents oxidizer, decomposition and contamination hazards. Heat, fuels, organics, acids or reducing agents can increase fire, explosion or toxic gas risk depending on the exact salt or mixture.

Use positive-pressure SCBA for fire, dust, decomposition or confined-space exposure. Chemical-resistant gloves, eye/face protection and protective clothing should be selected from SDS; avoid dust inhalation and contaminated runoff.

Fuels, organic material, reducing agents or contaminated absorbents can react violently with oxidizers and may increase fire, decomposition or explosion risk.
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.