UN 2837 — Sodium bisulphate, solution
Placard: Corrosive. ERG Guide 154. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2837 At a Glance
UN 2837 (Sodium bisulphate, solution) is listed as DOT Class 8 Corrosive and is assigned to ERG Guide 154. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
UN 2837 is Sodium bisulphate, solution, a corrosive acidic solution assigned to ERG Guide 154. Concentration affects burn severity and heat of dilution.
Hazard overview: CORROSIVE acidic bisulfate solution; splashes or mist can burn eyes, skin and respiratory tissue. Non-flammable aqueous solution, but acids can react with metals to generate hydrogen gas. Dilution or neutralization can release heat and cause splattering.
Response guidance: For UN 2837, 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 154.
Firefighter training notes: Training for UN 2837 should emphasize exposure routes, SCBA use, vapor/dust monitoring, fire behavior, decontamination, runoff containment and SDS verification. Use ERG 154, SDS and local SOP.
Regulatory context: Sodium bisulphate, solution 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: Sodium bisulphate, solution should be stored in tightly closed compatible containers with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 2837 Quick Details
Common Hazards of UN 2837
- CORROSIVE acidic bisulfate solution; splashes or mist can burn eyes, skin and respiratory tissue.
- Non-flammable aqueous solution, but acids can react with metals to generate hydrogen gas.
- Dilution or neutralization can release heat and cause splattering.
- Heating can release sulfur oxides and acidic fumes.
- Runoff may be acidic, corrosive and harmful to waterways.
- Exact concentration affects corrosivity and heat of dilution.
- Containers may fail when heated or damaged.
Chemical Identity & Physical Properties
Clear to slightly yellow acidic aqueous solution with a characteristic sulfurous odor. Corrosive liquid at room temperature.
| Also known as | Sodium hydrogen sulfate solutionSodium acid sulfate solutionBisulfate of soda solutionNaHSO4 solution |
| CAS Number | 7681-38-1 |
| Appearance | Clear to slightly yellow acidic aqueous solution with a characteristic sulfurous odor. Corrosive liquid at room temperature. |
| Flash Point | Not applicable (aqueous solution) |
| Boiling Point | Approximately 100-110C (212-230F) depending on concentration |
| Vapor Density | Not applicable (aqueous solution) |
| Water Reactivity | Already in aqueous solution; dilution generates heat but no violent reaction |
Fireground Response Guidance — UN 2837
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 2837 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 154, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 2837 — Sodium bisulphate, solutionUse 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.