Tungstosilicic acid hydrate

CAS 12027-43-9H4[Si(W3O10)4] · xH2OAcids & Bases

Tungstosilicic acid hydrate (CAS: 12027-43-9), with the formula H4[Si(W3O10)4] · xH2O, is a complex inorganic acid belonging to the Keggin family of polyoxometalates. It serves as a crucial reactant in various advanced chemical syntheses. Its applications range from the preparation of novel ionic liquids and photocatalysts to the development of proton-conducting membranes and catalytic oxidation processes, underscoring its importance in materials science and chemical research.

IUPAC: Silicotungstic acid

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Tungstosilicic acid hydrate (H4[Si(W3O10)4] · xH2O) — chemical structure, CAS 12027-43-9; Chemistry, fine chemical supplied by Tech Serve Solutions

AcidsAcids & BasesChemical SynthesisEssential ChemicalsInorganic AcidsMaterials ScienceMetal and Ceramic ScienceResearch EssentialsSaltsSynthetic Reagents

01 /Applications

Ionic Liquid Hybrid Materials

Tungstosilicic acid hydrate is a precursor in the preparation of unique silicotungstate-based ionic liquid hybrid materials, such as silicotungstic acid butylmethylimidazolium bromide.

Photocatalyst Synthesis

It is utilised in the synthesis of novel photocatalysts, including Sn(II)-substituted Keggin-type polyoxometalates, for applications in light-driven chemical transformations.

Proton-Conducting Membranes

The compound is employed in the development of advanced proton-conducting membranes by preparing silicotungstic acid functionalised with organically modified silanes.

Charge Transfer Compounds

Tungstosilicic acid hydrate is used in the preparation of specialised charge transfer compounds incorporating Keggin anions.

Catalysis

It functions as a catalyst in processes such as the catalytic liquid-phase oxidation of xylene, contributing to efficient chemical synthesis.

02 /Properties

Molecular weight	2878.17 (anhydrous basis)
Linear formula	H4[Si(W3O10)4] · xH2O
Loss on drying	≤20% loss on ignition
Application	Reactant for:• Preparation of silicotungstate butylmethylimidazolium bromide ionic liquid hybrid material1• Synthesis of SnII-substituted Keggin-type polyoxometalates as photocatalysts2• Preparation of silicotungstic acid/organically modified silane proton-conducting membranes3• Preparation of charge transfer compounds with Keggin anions4• Preparation of catalyst for catalytic liquid-phase oxidation of xylene5

03 /Safety & handling

GHS hazard pictogram: Harmful / irritant (GHS07) — Harmful / irritant

Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust, fume, gas or vapours
P305IF IN EYES

Protective equipment	dust mask type N95 (US), Eyeshields, Gloves
Water hazard class (WGK, DE)	3
Hazard codes (EU)	Xi
Risk statements (R)	36/37/38
Safety statements (S)	26-36
Cation traces	Ca: ≤200 mg/kgCd: ≤50 mg/kgCo: ≤50 mg/kgCu: ≤50 mg/kgFe: ≤50 mg/kgK: ≤200 mg/kgNa: ≤3000 mg/kgNi: ≤50 mg/kgPb: ≤50 mg/kgZn: ≤50 mg/kg
Anion traces	chloride (Cl-): ≤200 mg/kgsulfate (SO42-): ≤100 mg/kg

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

12027-43-9

MDL number

MFCD00150392

PubChem substance

24900077

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

06 /Frequently asked questions

What is Tungstosilicic acid hydrate used for?

Tungstosilicic acid hydrate is used as a reactant in chemical synthesis, including the preparation of silicotungstate ionic liquids, Sn(II)-substituted Keggin photocatalysts, proton-conducting membranes, charge transfer compounds, and catalysts for xylene oxidation.

What are the CAS number and chemical formula for Tungstosilicic acid hydrate?

The CAS number is 12027-43-9, and its chemical formula is H4[Si(W3O10)4] · xH2O.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies Tungstosilicic acid hydrate. The exact assay and purity are available on the Certificate of Analysis. This product is not represented as USP, BP, EP, or other pharmacopoeia grades.

How should Tungstosilicic acid hydrate be handled safely?

Tungstosilicic acid hydrate is classified as an irritant. Handle with appropriate personal protective equipment, including a dust mask (type N95 or equivalent), eyeshields, and gloves. Avoid breathing dust and ensure adequate ventilation. Refer to the Safety Data Sheet for detailed handling information.

Is Tungstosilicic acid hydrate a controlled substance?

Based on the provided data, Tungstosilicic acid hydrate is not listed as a controlled or scheduled substance.

How are Tech Serve Solutions' chemicals packed and exported?

Tech Serve Solutions specialises in the global supply and export of fine chemicals, ensuring appropriate packaging and adherence to international shipping regulations for safe and compliant transit.