UN 2967 — Sulphamic acid
Placard: Corrosive. ERG Guide 154. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2967 is Sulphamic acid, a corrosive acidic solid assigned to ERG Guide 154. Dust, acidic runoff and hydrogen-from-metals are key hazards.
Hazard overview: CORROSIVE acidic solid; dust or solution can burn eyes, skin and respiratory tissue. Dissolves in water to form acidic solution; no violent water reaction is expected. Non-combustible, but heating can release sulfur oxides, nitrogen oxides and acidic fumes.
Response guidance: For UN 2967, isolate the area, avoid skin contact and use SCBA where dust, vapor, mist or fire is present. Contain runoff and verify controls with SDS and ERG 154.
Firefighter training notes: Training for UN 2967 should emphasize exposure routes, SCBA use, vapor/dust monitoring, decontamination, runoff containment and SDS verification. Use ERG 154, SDS and local SOP.
Regulatory context: Sulphamic acid is regulated as a hazardous material for transport and emergency response. Storage, reporting, exposure, waste and incident-notification duties depend on quantity, formulation and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: Sulphamic acid should be stored in tightly closed compatible containers with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 2967 Quick Details
Common Hazards of UN 2967
- CORROSIVE acidic solid; dust or solution can burn eyes, skin and respiratory tissue.
- Dissolves in water to form acidic solution; no violent water reaction is expected.
- Non-combustible, but heating can release sulfur oxides, nitrogen oxides and acidic fumes.
- Contact with metals may generate flammable hydrogen gas under acidic conditions.
- Runoff may be acidic, corrosive and harmful to waterways.
- Dust can irritate lungs and contaminate clothing or tools.
- Containers may fail when heated or exposed to moisture.
Chemical Identity & Physical Properties
White crystalline solid or powder. Odorless. Non-hygroscopic at room temperature.
| Also known as | Sulfamic acidAmidosulfonic acidAminosulfonic acidSulfamidic acidImidosulfonic acid |
| CAS Number | 5329-14-6 |
| Appearance | White crystalline solid or powder. Odorless. Non-hygroscopic at room temperature. |
| Flash Point | Not applicable (non-flammable solid) |
| Boiling Point | Decomposes at approximately 209C (408F) without boiling |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Dissolves in water forming acidic solution; no violent reaction |
Fireground Response Guidance — UN 2967
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 2967 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, gas, 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 154, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 2967 — Sulphamic acidUse 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.