UN 2865 — Hydroxylamine sulphate
Placard: Corrosive. ERG Guide 154. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
Hydroxylamine sulphate is a toxic/corrosive crystalline solid used in chemical processing. Heat, decomposition, and corrosive solutions create the main response concerns.
Hazard overview: The material can injure responders by direct contact, inhalation of dust or decomposition gases, and contaminated aqueous solutions. Heating should be avoided because decomposition can accelerate hazards.
Response guidance: Isolate the spill, avoid dust, and contain all solutions or runoff. Use water spray, dry chemical, or CO2 for surrounding fires while avoiding high-pressure streams on hot or spilled material.
Firefighter training notes: Training should cover toxic dust/vapor control, decontamination, runoff containment, respiratory protection, and SDS-based exposure precautions for UN 2865.
Regulatory context: Confirm the exact shipping description, hazard class, packaging, SDS, and ERG 154; disposal and cleanup may require hazardous-waste controls.
Storage & handling: Store tightly closed in a dry, labeled area away from food, incompatible materials, and conditions that could spread dust, vapor, or contaminated runoff.
UN 2865 Quick Details
Common Hazards of UN 2865
- Toxic and corrosive solid; contact with powder or solutions can injure skin and eyes.
- Inhalation or ingestion can cause serious health effects.
- Heating may cause decomposition and release irritating or toxic gases.
- Solutions can be corrosive and contaminated runoff must be contained.
- Nonflammable itself, but decomposition can intensify incident conditions.
- Containers may rupture when heated.
- Avoid high-pressure streams that spread hot material or contaminated solution.
Chemical Identity & Physical Properties
White to off-white crystalline solid or powder. Odorless or faint ammonia-like odor at room temperature
| 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 |
Fireground Response Guidance — UN 2865
Extinguishing Media
PPE Requirements
SCBA for fire or confined spaces; chemical-resistant suit, gloves, boots, and eye/face protection for solids or solutions.
Isolation & Evacuation
First Actions for a UN 2865 Incident
- Call 911 and the emergency response number shown on shipping papers or the SDS.
- Keep unauthorized personnel away and prevent dust, vapor, or runoff from spreading.
- Stay upwind, uphill, and upstream; avoid breathing dust, fumes, or fire gases.
- Avoid all skin and eye contact with powder, liquid, solutions, or contaminated clothing.
- Do not touch damaged containers or spilled material without chemical-resistant PPE.
- Control runoff and keep material out of drains, soil, and waterways.
- Use ERG guidance, SDS, shipping papers, and exposure monitoring before cleanup.
📋 Copy & Share Field Card
UN 2865 — Hydroxylamine sulphateUse 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.