☣️ UN 1730 • CLASS 8
UN 1730 — Antimony pentachloride, liquid
Placard: Corrosive. ERG Guide 157. 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.
Antimony pentachloride, liquid is a highly toxic and corrosive substance that requires immediate attention. It can cause severe burns and respiratory problems.
Hazard overview: Inhalation, ingestion, or contact with vapors, dusts, or the substance can cause toxic and corrosive effects. Reaction with water or moist air may release toxic, corrosive, or flammable gases.
Response guidance: Isolate the area and evacuate people within 25 meters. Use dry chemical, soda ash, or lime to extinguish fires.
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UN 1730 Quick Details
UN 1730
Product name: Antimony pentachloride, liquid
DOT Class: 8
Placard type: Corrosive
ERG Guide: 157 (check current ERG)
Initial isolation: ERG 157: isolate 25m (75ft) all directions initially; spill: 50m (150ft) downwind daytime, 100m (300ft) night; if tank/rail car involved in fire, isolate 800m (0.5 mi) all directions
Common Hazards of UN 1730
- TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
- Reaction with water or moist air may release toxic, corrosive or flammable gases.
- Reaction with water may generate much heat that will increase the concentration of fumes in the air.
- Fire will produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive
- UN1802, UN2032, UN3084, UN3093, UN1796 (above 50%), UN1826 (above 50%), and UN2031 (above
- Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.).
Chemical Identity & Physical Properties
Colorless to reddish-yellow oily liquid with a pungent, acrid odor.
| Also known as | Antimony(V) chloridePentachloroantimonyAntimonic chlorideAntimony perchloride |
| CAS Number | 7647-18-9 |
| Appearance | Colorless to reddish-yellow oily liquid with a pungent, acrid odor. Fumes strongly in moist air producing dense white clouds of hydrochloric acid. |
| Flash Point | Not applicable (non-flammable) |
| Boiling Point | 79C (174F) with decomposition |
| Vapor Density | 9.2 (much heavier than air) |
| Water Reactivity | Reacts violently with water releasing toxic hydrochloric acid and antimony oxychloride fumes. Generates significant heat. Do not use water directly on material. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1730
Extinguishing Media
Dry chemical, soda ash, lime; do not use water or aqueous agents directly on liquid
PPE Requirements
⚠️ Level A or B minimum; SCBA required; acid-resistant suit; avoid all contact with vapors and liquid
Level A or B minimum; SCBA required; acid-resistant suit; avoid all contact with vapors and liquid.
Isolation & Evacuation
ERG 157: isolate 25m (75ft) all directions initially; spill: 50m (150ft) downwind daytime, 100m (300ft) night; if tank/rail car involved in fire, isolate 800m (0.5 mi) all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 157).
First Actions for a UN 1730 Incident
- 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
- 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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📋 Copy & Share Field Card
UN 1730 — Antimony pentachloride, liquidHAZMAT RADIO NOTE — UN 1730
Product: Antimony pentachloride, liquid
Class 8 / Corrosive / ERG 157
PPE: Level A or B minimum; SCBA required; acid-resistant suit; avoid all contact with vapors and liquid
ISOLATION: ERG 157: isolate 25m (75ft) all directions initially; spill: 50m (150ft) downwind daytime, 100m (300ft) night; if tank/rail car involved in fire, isolate 800m (0.5 mi) all directions
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 1730 — Antimony pentachloride, liquid
Class: 8 | Placard: Corrosive | ERG Guide: 157
Appearance: Colorless to reddish-yellow oily liquid with a pungent, acrid odor. Fumes strongly in moist air producing dense white clouds of hydrochloric acid.
Water Reactivity: Reacts violently with water releasing toxic hydrochloric acid and antimony oxychloride fumes. Generates significant heat. Do not use water directly on material.
Extinguishing: Dry chemical, soda ash, lime; do not use water or aqueous agents directly on liquid
PPE: Level A or B minimum; SCBA required; acid-resistant suit; avoid all contact with vapors and liquid
Isolation: ERG 157: isolate 25m (75ft) all directions initially; spill: 50m (150ft) downwind daytime, 100m (300ft) night; if tank/rail car involved in fire, isolate 800m (0.5 mi) all directions
— Key Hazards —
• TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
• Reaction with water or moist air may release toxic, corrosive or flammable gases.
• Reaction with water may generate much heat that will increase the concentration of fumes in the air.
— First Actions —
• 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
SOURCE: allfirefighter.com/hazmat/un/1730 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1730 Antimony pentachloride, liquid Cls8 ERG157 | allfirefighter.com/hazmat/un/1730SMS / 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/antimony-pentachloride-liquid-un-1730
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Frequently Asked Questions about UN 1730
No
No, do not use water or aqueous agents directly on liquid
Level A or B minimum; SCBA required; acid-resistant suit; avoid all contact with vapors and liquid
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.