UN 2819 — Amyl acid phosphate
Placard: Corrosive. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2819 At a Glance
UN 2819 (Amyl acid phosphate) is listed as DOT Class 8 Corrosive and is assigned to ERG Guide 153. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
UN 2819 is Amyl acid phosphate, a corrosive organic acid phosphate assigned to ERG Guide 153. Acidic runoff and combustible fire behavior are key concerns.
Hazard overview: CORROSIVE organic acid phosphate liquid; skin, eye or respiratory contact can cause severe injury. Combustible liquid: may burn but does not ignite readily. Hydrolyzes slowly with water, forming acidic phosphate-containing runoff.
Response guidance: For UN 2819, isolate the area, avoid skin contact and use SCBA where dust, vapor, mist or fire is present. Contain corrosive/toxic runoff and verify controls with SDS and ERG 153.
Firefighter training notes: Training for UN 2819 should emphasize exposure routes, SCBA use, vapor/dust monitoring, fire behavior, decontamination, runoff containment and SDS verification. Use ERG 153, SDS and local SOP.
Regulatory context: Amyl acid phosphate is regulated as a hazardous material for transport and emergency response. Storage, exposure, spill reporting, waste and fire-code duties depend on quantity, concentration and jurisdiction; verify shipping papers, SDS and local authority requirements.
Storage & handling: Amyl acid phosphate should be stored in tightly closed compatible containers with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 2819 Quick Details
Common Hazards of UN 2819
- CORROSIVE organic acid phosphate liquid; skin, eye or respiratory contact can cause severe injury.
- Combustible liquid: may burn but does not ignite readily.
- Hydrolyzes slowly with water, forming acidic phosphate-containing runoff.
- Heated vapors may collect in low or confined areas and form ignitable mixtures.
- Fire may produce phosphorus oxides, carbon monoxide and irritating/toxic smoke.
- Runoff may be acidic, corrosive and harmful to waterways.
- Containers may rupture or fail when heated.
Chemical Identity & Physical Properties
Clear to pale yellow liquid with a mild characteristic odor. Corrosive organic phosphate ester.
| Also known as | Amyl phosphatePentyl phosphateAmyl acid orthophosphatePhosphoric acid amyl ester |
| Appearance | Clear to pale yellow liquid with a mild characteristic odor. Corrosive organic phosphate ester. |
| Flash Point | 93C (200F) |
| Boiling Point | Approximately 200-250C (392-482F) with decomposition |
| Vapor Density | Greater than 1 (heavier than air) |
| Water Reactivity | Hydrolyzes slowly in water producing phosphoric acid; avoid prolonged contact |
Fireground Response Guidance — UN 2819
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for vapor, dust, mist, fire or confined-space exposure. Wear chemical-resistant gloves, boots, eye/face protection and protective clothing.
Isolation & Evacuation
First Actions for a UN 2819 Incident
- Call 911 and the emergency response number on the shipping paper, if available.
- Keep unauthorized personnel away and establish incident command.
- Stay upwind, uphill and upstream.
- Avoid breathing vapor, dust, mist, smoke or fumes and avoid skin or eye contact.
- Do not touch damaged containers or spilled material without proper training and PPE.
- Prevent contaminated liquid, dust, runoff and decontamination waste from spreading.
- Ventilate confined spaces only after monitoring and only if properly trained and equipped.
- Use ERG Guide 153, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 2819 — Amyl acid phosphateUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.