UN 1828 — Sulphur chlorides
Placard: Corrosive. ERG Guide 137. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 1828 is Sulphur chlorides, a corrosive sulfur chloride liquid assigned to ERG Guide 137. Water contact can release heat, hydrogen chloride and sulfur dioxide gases.
Hazard overview: UN 1828 presents water-reactive, corrosive fume, sulfur dioxide/HCl vapor and acidic-runoff hazards. Vapors may settle in low areas and dry control methods are preferred until SDS confirms otherwise.
Response guidance: For a UN 1828 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 137. Establish incident command, isolate the area, stay upwind, prevent incompatible contact, control runoff and choose entry or fire-control actions based on monitoring, SDS and local SOP.
Firefighter training notes: Training for UN 1828 should emphasize water-reactive fuming liquid behavior, dense acid vapor clouds, dry-agent selection, downwind control, PPE selection and decontamination. Use ERG 137, SDS and local hazmat SOP.
Regulatory context: Sulphur chlorides is regulated as a hazardous material for transportation and emergency response purposes. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by concentration, formulation, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, facility documents and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.
Storage & handling: Sulphur chlorides should be stored in tightly closed compatible containers in a cool, dry, well-ventilated area away from water, moisture, bases, oxidizers/reducing agents where incompatible, heat and unauthorized access. Protect containers from corrosion, leakage and contamination.
UN 1828 Quick Details
Common Hazards of UN 1828
- TOXIC and CORROSIVE sulfur chloride liquid; inhalation, ingestion or contact may cause severe injury.
- Reacts violently with water or moist air, releasing heat, hydrogen chloride and sulfur dioxide.
- Vapors are heavier than air and may collect in low or confined areas.
- Liquid and fumes can burn eyes, skin and respiratory tissue.
- May burn under fire conditions and produce corrosive/toxic gases.
- Runoff may spread acidic sulfur/chloride contamination.
- Containers may rupture or fail when heated or contaminated with water.
Chemical Identity & Physical Properties
Amber to yellowish-red oily liquid with a pungent, irritating odor similar to sulfur dioxide. Highly corrosive and fuming in moist air.
| Also known as | Sulfur monochlorideSulfur dichlorideDisulfur dichlorideS2Cl2SCl2Thionyl chloride |
| Appearance | Amber to yellowish-red oily liquid with a pungent, irritating odor similar to sulfur dioxide. Highly corrosive and fuming in moist air. |
| Flash Point | 118C (245F) for S2Cl2 |
| Boiling Point | 138C (280F) for S2Cl2; 59C (138F) for SCl2 |
| Vapor Density | 4.7 (heavier than air) |
| Water Reactivity | Reacts violently with water releasing toxic and corrosive hydrogen chloride (HCl) and sulfur dioxide (SO2) gases with significant heat generation |
Fireground Response Guidance — UN 1828
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for vapor, fume, fire or confined-space exposure. Chemical-resistant gloves, boots, eye/face protection and protective clothing should be selected from SDS; Level A may be needed for close entry or unknown concentrations.
Isolation & Evacuation
First Actions for a UN 1828 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Avoid breathing vapors, fumes, dust, mist or spray and avoid skin or eye contact.
- Keep water and moisture away from released product unless incident command confirms a compatible cooling or control use.
- Do not touch or walk through spilled material unless properly trained and wearing appropriate protective equipment.
- Ventilate closed spaces before entering, but only if properly trained, equipped, monitored and authorized by incident command.
- Isolate the spill or leak area and expand the perimeter if vapor, dust, fire involvement, water reaction or unknown concentration is present.
- Use ERG Guide 137, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 1828 — Sulphur chloridesUse 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.