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Tin (IV) Iodide
CAS: 7790-47-8
SKU: S2477
Tin (IV) Iodide | SKU: S2477
Synonyms: Stannic iodide; Tin tetraiodide; Tin(IV) iodide; Tin iodide (1:4); Stannane, tetraiodo-
Tin (IV) Iodide
Tin(IV) iodide, also known as stannic iodide or tin tetraiodide (SnI4), is a bright, moisture-sensitive metal iodide supplied here in an ultra-dry, anhydrous form. It is a heavy, dense powder (density about 4.47 g/mL) that serves as a source of both tin(IV) and iodide in materials synthesis, thin-film research and inorganic and organometallic chemistry. Demand for high-purity tin iodides has grown with research into lead-free tin halide perovskite solar cells, where the Sn(II)/Sn(IV) balance controls device stability, and SnI4 is used as a reference, additive and precursor in that work. It is also used as a precursor in material synthesis, in electroplating chemistry, and as a Lewis-acidic tin source in the preparation of other tin compounds. Sarchem Labs offers tin(IV) iodide in sealed ampule packaging to protect it from humidity, with a Certificate of Analysis and Safety Data Sheet for every lot. The assay is expressed on a metals basis, and the Certificate of Analysis gives the lot value.
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Specifications

Boiling Point340°C
Melting Point~143°C
Density4.47 g/mL at 25°C (lit.)
PackagingAmpule
Linear FormulaSnI4
Formula Weight626.31
Physical FormPowder
Chemical Name or MaterialTin(IV) iodide, Ultra dry
UN NumberUN3260
Molecular Weight626.33 g/mol
SMILES StringI[Sn](I)(I)I
GradeAnhydrous
Merck Index14,8777
Solubility InformationSoluble in alcohol,benzene,carbon disulfide,chloroform and ether.
SensitivityMoisture sensitive
Refractive Index2.106
Total Trace Metal Impurities≤15.0 ppm trace metal analysis
Assay99.999% trace metals basis
SolubilitySoluble in alcohol, benzene, carbon disulfide, chloroform and ether
CAS Number7790-47-8
EC Number232-208-4
NACRESNA.23
PubChem Substance ID24865633
UNSPSC Code12352302
MDL NumberMFCD00036272
InChI1S/4HI.Sn/h4*1H;/q;;;;+4/p-4
InChI KeyQPBYLOWPSRZOFX-UHFFFAOYSA-J
PubChem CID24631
Reaction SuitabilityCore: tin
FormPowder
Product LineDeposition system
ApplicationsTin halide perovskite research: used as a tin(IV) reference compound and precursor in studies of Sn(II) oxidation, defect chemistry and fluoride or additive engineering in lead-free perovskite solar cells.

Applications

Tin halide perovskite research: used as a tin(IV) reference compound and precursor in studies of Sn(II) oxidation, defect chemistry and fluoride or additive engineering in lead-free perovskite solar cells.
Materials synthesis: acts as a precursor for tin-containing semiconductors, tin oxide films and mixed-metal halide phases made by solution or mechanochemical routes.
Electroplating and surface chemistry: serves as a tin source in specialty plating and deposition research.
Inorganic and organometallic synthesis: a convenient, soluble source of tin(IV) for preparing organotin iodides, complexes with N- or O-donor ligands, and other tin halides.
Thin-film deposition research: listed under a deposition-system product line, where precursor purity and dryness control film quality.

Product Description

What is Tin(IV) Iodide?

Tin(IV) iodide is the tetra-iodide of tin in its +4 oxidation state, with the formula SnI4 and a molecular weight of 626.33 g/mol. It is a covalent, molecular solid that is typically orange to red in colour and dissolves in non-polar organic solvents such as benzene, chloroform and carbon disulfide. In the presence of water it hydrolyses, releasing hydrogen iodide and forming hydrated tin oxide species, which is why moisture exclusion is essential.

The reference grade is anhydrous, 99.999% on a trace-metals basis, with total trace-metal impurities at or below 15 ppm. Sigma-Aldrich lists a density of 4.47 g/mL at 25 °C and classes it under electroplating, material synthesis precursor and perovskite solar-cell applications.

Uses of Tin(IV) Iodide

Research teams in photovoltaics use tin(IV) iodide when probing why tin-based perovskites degrade: Sn(II) is easily oxidised to Sn(IV), and having a clean, authentic Sn(IV) iodide source allows spectroscopic and structural benchmarking. It is also employed as a precursor in mechanochemical and solution syntheses of pure-tin and mixed tin–lead iodide perovskites.

In synthetic inorganic chemistry, tin(IV) iodide is a starting point for molecular tin complexes; studies of π-iodide interactions in tin(IV) iodide complexes with organic ligands illustrate its use in crystal engineering and semiconductor-type materials. In industry, it features in niche electroplating and deposition processes where a halide tin source is required.

Buying and Handling Considerations

Specify the grade you need before ordering. This listing is an ultra-dry grade packed in ampules, intended for users who open the container only under inert atmosphere or in a glove box. Open ampules in a dry-box or under a stream of dry nitrogen or argon, and use dry glassware and solvents. Store sealed containers in a cool, dry place away from water, alcohols and bases.

Safety Information

Based on Sigma-Aldrich’s verified classification (409294).

  • Pictograms / Signal Word: GHS08 (health hazard), GHS05 (corrosion), GHS07 (exclamation mark) | Danger
  • Hazard Statements: H302 + H312 + H332 (harmful if swallowed, in contact with skin or if inhaled), H314 (causes severe skin burns and eye damage), H317 (may cause an allergic skin reaction), H334 (may cause allergy or asthma symptoms or breathing difficulties if inhaled)
  • Hazard Classification: Acute Tox. 4 (Dermal, Inhalation, Oral), Eye Dam. 1, Resp. Sens. 1, Skin Corr. 1B, Skin Sens. 1
  • Precautionary Statements: P260, P280, P301 + P312, P303 + P361 + P353, P304 + P340 + P310, P305 + P351 + P338
  • Storage Class: 8A – Combustible corrosive hazardous materials | WGK: 3 | Flash Point: not applicable
  • PPE: Eyeshields, faceshields, gloves, type P3 (EN 143) respirator cartridges
  • Transport: UN 3260 (corrosive solid, acidic, inorganic, n.o.s.)

Handle in a fume hood or glove box, avoid breathing dust and contact with skin or eyes, and wash thoroughly after use. Contact with moisture releases corrosive hydrogen iodide, so never add water to the solid.

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FAQs: Tin (IV) Iodide

It is used as a tin(IV) source in materials synthesis, as a precursor and reference compound in lead-free tin halide perovskite research, in electroplating and deposition studies, and as a starting material for organotin and other tin halide compounds.

The formula is SnI4 and the molecular weight is 626.33 g/mol according to Sigma-Aldrich. The density of the reference grade is 4.47 g/mL at 25 °C.

Tin(IV) iodide hydrolyses on contact with moisture, releasing hydrogen iodide and degrading the material. Ampule packaging keeps the solid dry until it is opened under inert gas or in a glove box.

Yes. It is corrosive to skin and eyes (H314), a respiratory and skin sensitiser (H334, H317) and harmful by ingestion, skin contact and inhalation (H302 + H312 + H332). It is classed as a corrosive solid, UN3260, and requires fume-hood or glove-box handling with full eye, face and hand protection.

Keep it sealed in its original ampule or a tightly closed container in a cool, dry place, away from water, alcohols, strong bases and oxidisers. Once opened, store under dry nitrogen or argon.

No. Stannous iodide is tin(II) iodide (SnI2, CAS 10294-70-9). Tin(IV) iodide is SnI4, CAS 7790-47-8. They differ in oxidation state, colour and reactivity.

Yes. Every lot of SKU S2477 includes a Certificate of Analysis and Safety Data Sheet, and Sarchem Labs can quote laboratory, pilot and bulk quantities.