☣️ UN 2865 • CLASS 8
UN 2865 — Hydroxylamine sulphate
Placard: Corrosive. ERG Guide 154. 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.
Advertisement
UN 2865 Quick Details
UN 2865
Product name: Hydroxylamine sulphate
DOT Class: 8
Placard type: Corrosive
ERG Guide: 154 (check current ERG)
Initial isolation: ERG 154: isolate spill area 25-50m all directions; if tank/railcar involved in fire, isolate 800m in all directions and consider evacuation
Common Hazards of UN 2865
- 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
| Also known as | Hydroxylamine sulfateHydroxylammonium sulfateHydroxylamine hemisulfateBis(hydroxylammonium) sulfate |
| CAS Number | 10039-54-0 |
| Appearance | White to off-white crystalline solid or powder. Odorless or faint ammonia-like odor at room temperature. |
| Flash Point | Not applicable (non-flammable solid) |
| Boiling Point | Decomposes at approximately 170C (338F) before boiling |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Soluble in water; no violent reaction but decomposes slowly in aqueous solution |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2865
Extinguishing Media
Water spray, dry chemical, CO2 suitable; avoid high-pressure water streams on hot material
PPE Requirements
⚠️ Level B minimum; SCBA required in fire or confined space; chemical-resistant gloves and full body protection for contact with solid or solutions
Isolation & Evacuation
ERG 154: isolate spill area 25-50m all directions; if tank/railcar involved in fire, isolate 800m in all directions and consider evacuation
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 154).
First Actions for a UN 2865 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
- 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
Advertisement
📋 Copy & Share Field Card
UN 2865 — Hydroxylamine sulphateHAZMAT RADIO NOTE — UN 2865
Product: Hydroxylamine sulphate
Class 8 / Corrosive / ERG 154
PPE: Level B minimum; SCBA required in fire or confined space; chemical-resistant gloves and full body protection for contact with solid or solutions
ISOLATION: ERG 154: isolate spill area 25-50m all directions; if tank/railcar involved in fire, isolate 800m in all directions and consider 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 2865 — Hydroxylamine sulphate
Class: 8 | Placard: Corrosive | ERG Guide: 154
Appearance: White to off-white crystalline solid or powder. Odorless or faint ammonia-like odor at room temperature.
Water Reactivity: Soluble in water; no violent reaction but decomposes slowly in aqueous solution
Extinguishing: Water spray, dry chemical, CO2 suitable; avoid high-pressure water streams on hot material
PPE: Level B minimum; SCBA required in fire or confined space; chemical-resistant gloves and full body protection for contact with solid or solutions
Isolation: ERG 154: isolate spill area 25-50m all directions; if tank/railcar involved in fire, isolate 800m in all directions and consider evacuation
— 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 —
• 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/2865 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2865 Hydroxylamine sulphate Cls8 ERG154 | ERG 154: isolate spill area 25-50m all directions; if tank/railcar involved in f | allfirefighter.com/hazmat/un/2865SMS / 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/2865
Advertisement
Frequently Asked Questions about UN 2865
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.
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; SCBA required in fire or confined space; chemical-resistant gloves and full body protection for contact with solid or solutions
Water reactivity: Soluble in water; no violent reaction but decomposes slowly in aqueous solution. Recommended extinguishing: Water spray, dry chemical, CO2 suitable; avoid high-pressure water streams on hot material.
ERG Guide 154 recommendation: ERG 154: isolate spill area 25-50m all directions; if tank/railcar involved in fire, isolate 800m in all directions and consider evacuation
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 154 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.