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 At a Glance
UN 2440 (Stannic chloride, pentahydrate) 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 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.