☣️ UN 1760 • CLASS 8

UN 1760 — Compounds, tree or weed killing, liquid (corrosive)

Placard: Corrosive. ERG Guide 154. 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.

Compounds, tree or weed killing, liquid, are widely used in agriculture and landscaping. They are classified as a DOT Class 8 material, indicating they are toxic and/or corrosive. First responders may encounter these compounds during transportation accidents, industrial spills, or fires. The scale of production and transport of these compounds is significant, with millions of tons produced annually. These compounds are typically colored liquids with a chemical or solvent odor. It is essential for first responders to be aware of the hazards associated with these compounds and take necessary precautions to ensure a safe response. Compounds, tree or weed killing, liquid, are used in various applications, including agriculture, landscaping, and forestry.

Hazard overview: Compounds, tree or weed killing, liquid, are toxic and/or corrosive, and inhalation, ingestion, or skin contact with the material may cause severe injury. Contact with molten substance may cause severe burns to skin and eyes. Fire may produce irritating, corrosive, and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental damage. The LC50 value for these compounds is not well-established, but they are known to be highly toxic. The IDLH value is also not well-established, but it is recommended to use SCBA in concentrated vapors or confined spaces. These compounds have a vapor density of 3-5, which is heavier than air, and can still pose a significant hazard due to their corrosive nature.

Response guidance: In the event of a Compounds, tree or weed killing, liquid, spill, it is essential to isolate the area, with a spill requiring a 25-50m isolation zone in all directions, and consider evacuation of the immediate area if fire is present. Evacuation zones should be established, and correct suppression agents, such as alcohol-resistant foam, should be used. Decontamination is crucial, and CHEMTREC should be contacted in case of an emergency. First responders should be aware of the potential for these compounds to react with water, generating heat, and take necessary precautions to avoid any violent reactions. The isolation distance for a major spill should be 800m downwind.

Firefighter training notes: First responders should be trained to respond to Compounds, tree or weed killing, liquid, spills and fires, with a focus on isolation, evacuation, and suppression. A known tactical error for this chemical class is the use of incorrect suppression agents, which can exacerbate the situation. ICS position needs and mutual aid criteria should be established to ensure a coordinated response. First responders should be aware of the potential for these compounds to react with water and take necessary precautions to avoid any violent reactions.

Regulatory context: Compounds, tree or weed killing, liquid, are classified as a DOT Class 8 material, indicating they are toxic and/or corrosive. The OSHA PEL/TLV is not well-established, but it is recommended to follow the guidelines for toxic and corrosive substances. These compounds are not listed on the CERCLA list, but they can still pose a significant environmental hazard due to their corrosive nature.

Storage & handling: Compounds, tree or weed killing, liquid, should be stored in a well-ventilated area, away from incompatible materials such as strong bases and reducing agents. The temperature limit should be below 50C (122F), and the container type should be compatible with the substance. The ventilation standard should be established to prevent the accumulation of toxic and corrosive vapors.

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UN 1760 Quick Details

UN 1760
Product name: Compounds, tree or weed killing, liquid (corrosive)
DOT Class: 8
Placard type: Corrosive
ERG Guide: 154 (check current ERG)
Initial isolation: ERG 154: Isolate spill 25-50m all directions; evacuate immediate area if fire; consider evacuation 800m downwind for major spill

Common Hazards of UN 1760

  • TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
  • Contact with molten substance may cause severe burns to skin and eyes.
  • Avoid any skin contact.
  • Fire may 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
  • Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.).
  • Corrosives in contact with metals may evolve flammable hydrogen gas.

Chemical Identity & Physical Properties

Compounds, tree or weed killing, liquid, are typically colored liquids with a chemical or solvent odor. They have a flash point of 23-60C (73-140F), which varies by formulation, and a boiling point of 100-200C (212-392F), depending on the solvent base. The vapor density is 3-5, which is heavier than air, and the specific gravity is approximately 0.9-1.1, depending on the formulation.

Also known asCorrosive herbicide liquidCorrosive pesticide liquidTree killing compound liquidWeed killing compound liquidHerbicidal corrosive solution
AppearanceVaries widely - typically colored liquid (amber, brown, or clear) with chemical or solvent odor. Corrosive nature causes immediate tissue damage on contact.
Flash PointVaries by formulation - typically 23-60C (73-140F) for organic solvent-based products
Boiling PointVaries by formulation - typically 100-200C (212-392F) depending on solvent base
Vapor DensityVaries - typically 3-5 (heavier than air) for organic solvent formulations
Water ReactivityMay react with water generating heat; dilution may be hazardous due to corrosivity
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.

Fireground Response Guidance — UN 1760

Extinguishing Media

Alcohol-resistant foam recommended; dry chemical for fires; avoid water spray on bulk liquid

PPE Requirements

⚠️ Level B minimum with SCBA; acid/alkali resistant suit, gloves, and boots required; face shield and eye protection mandatory

A minimum of Level B PPE is required, including an acid/alkali resistant suit, gloves, and boots, face shield, and eye protection. The rationale for each item is to prevent skin contact and inhalation of toxic and corrosive substances. The suit material should be acid/alkali resistant, and the glove specification should be compatible with the substance.

Isolation & Evacuation

ERG 154: Isolate spill 25-50m all directions; evacuate immediate area if fire; consider evacuation 800m downwind for major spill
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 154).

First Actions for a UN 1760 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 1760 — Compounds, tree or weed killing, liquid
HAZMAT RADIO NOTE — UN 1760 Product: Compounds, tree or weed killing, liquid (corrosive) Class 8 / Corrosive / ERG 154 PPE: Level B minimum with SCBA; acid/alkali resistant suit, gloves, and boots required; face shield and eye protection mandatory ISOLATION: ERG 154: Isolate spill 25-50m all directions; evacuate immediate area if fire; consider evacuation 800m downwind for major spill 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 1760 — Compounds, tree or weed killing, liquid (corrosive) Class: 8 | Placard: Corrosive | ERG Guide: 154 Appearance: Varies widely - typically colored liquid (amber, brown, or clear) with chemical or solvent odor. Corrosive nature causes immediate tissue damage on contact. Water Reactivity: May react with water generating heat; dilution may be hazardous due to corrosivity Extinguishing: Alcohol-resistant foam recommended; dry chemical for fires; avoid water spray on bulk liquid PPE: Level B minimum with SCBA; acid/alkali resistant suit, gloves, and boots required; face shield and eye protection mandatory Isolation: ERG 154: Isolate spill 25-50m all directions; evacuate immediate area if fire; consider evacuation 800m downwind for major spill — Key Hazards — • TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury • Contact with molten substance may cause severe burns to skin and eyes. • Avoid any skin contact. — 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/compounds-tree-or-weed-un-1760 | Always use current ERG + SOP/SOGIC BRIEFING

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

SMS (short)
UN1760 Compounds, tree or weed killing, liquid (corrosive) Cls8 ERG154 | allfirefighter.com/hazmat/un/compounds-tree-or-weed-un-1760SMS / 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/compounds-tree-or-weed-un-1760

Related UN Numbers in Class 8

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 1760

Yes, Compounds, tree or weed killing, liquid, are flammable, with a flash point of 23-60C (73-140F).

A minimum of Level B PPE is required, including an acid/alkali resistant suit, gloves, and boots, face shield, and eye protection.

Exposure to Compounds, tree or weed killing, liquid, can cause severe injury, including burns to skin and eyes, and respiratory problems. Prolonged exposure can lead to more severe health effects, including organ damage.

Compounds, tree or weed killing, liquid, are typically colored liquids with a chemical or solvent odor.

Alcohol-resistant foam is recommended for Compounds, tree or weed killing, liquid, fires, as well as dry chemical for fires and avoiding water spray on bulk 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.