UN 2440 — Stannic chloride, pentahydrate
Placard: Corrosive. ERG Guide 154. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2440 is Stannic chloride, pentahydrate, a corrosive tin chloride hydrate assigned to ERG Guide 154. Moisture can form acidic solution and corrosive fumes.
Hazard overview: CORROSIVE tin chloride hydrate; dust, mist or solution can burn eyes, skin and respiratory tissue. Deliquescent material can fume in moist air and form acidic hydrochloric-acid-containing solution. Dissolution in water may release heat and create corrosive runoff.
Response guidance: For UN 2440, isolate the area, avoid skin contact and use SCBA where dust, vapor, mist or fire is present. Contain toxic/corrosive runoff and verify exact product controls with SDS and ERG 154.
Firefighter training notes: Training for UN 2440 should emphasize toxic/corrosive exposure routes, skin absorption, SCBA use, decontamination, runoff containment and SDS verification. Use ERG 154, SDS and local SOP.
Regulatory context: Stannic chloride, pentahydrate 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: Stannic chloride, pentahydrate should be stored dry in tightly closed compatible containers away from moisture, bases, metals where incompatible and unauthorized access. Provide containment for acidic/corrosive runoff.
UN 2440 Quick Details
Common Hazards of UN 2440
- CORROSIVE tin chloride hydrate; dust, mist or solution can burn eyes, skin and respiratory tissue.
- Deliquescent material can fume in moist air and form acidic hydrochloric-acid-containing solution.
- Dissolution in water may release heat and create corrosive runoff.
- Non-combustible, but heating can produce hydrogen chloride and metal chloride fumes.
- Contact with metals may generate flammable hydrogen gas under some conditions.
- Runoff may be acidic, corrosive and harmful to waterways.
- Avoid dust generation and moisture spread.
Chemical Identity & Physical Properties
White to slightly yellow crystalline solid or powder with a pungent, acrid odor. Deliquescent and forms dense white fumes in moist air.
| Also known as | Tin(IV) chloride pentahydrateTin tetrachloride pentahydrateStannic chloride 5-hydrateButter of tin pentahydrate |
| CAS Number | 10026-06-9 |
| Appearance | White to slightly yellow crystalline solid or powder with a pungent, acrid odor. Deliquescent and forms dense white fumes in moist air. |
| Flash Point | Not applicable (non-flammable inorganic salt) |
| Boiling Point | Not applicable (decomposes upon heating, releases HCl gas) |
| Vapor Density | Not applicable (solid crystalline material) |
| Water Reactivity | Highly soluble in water, producing heat and acidic solution; forms hydrochloric acid upon contact with moisture |
Fireground Response Guidance — UN 2440
Extinguishing Media
PPE Requirements
Use protective equipment selected from SDS, monitoring results and incident command.
Isolation & Evacuation
First Actions for a UN 2440 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.
- 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 2440 — Stannic chloride, pentahydrateUse 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.