Molekula
Tungstosilicic acid hydrate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Tungstosilicic acid hydrate is a heteropoly acid composed of tungsten, silicon, and oxygen, widely used as a catalyst in organic synthesis, a mordant in dyeing, and a corrosion inhibitor in industrial applications. It appears as a white to yellowish crystalline powder with high solubility in water. Catalogue details: CAS 12027-43-9, molecular formula H4[Si(W3O10)4] · xH2O, molecular weight 2878.17 g/mol, and requires storage at ambient conditions. Handling requires caution—marked as Danger due to potential hazards. Molekula supplies tungstosilicic acid hydrate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £193.00 per pack ex VAT · £231.60 inc. VAT
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Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White to light yellow powder |
| Chloride (Cl-) | ≤0.001% |
| Assay | ≥99.0% |
| Heavy Metals (Pb) | ≤0.002% |
| Iron (Fe) | ≤0.001% |
| Potassium (K) | ≤0.02% |
| Sodium (Na) | ≤0.02% |
| Sulphates (SO4)(2-) | ≤0.005% |
| Loss on Ignition (750°C) | ≤16% |
| Total nitrogen (N) | ≤0.002% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | III |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90024874 |
| CAS Number | 12027-43-9 |
| IUPAC Name | silicic acid;dodecakis(trioxotungsten);hydrate |
| Molecular Formula | H4[Si(W3O10)4] · xH2O |
| Molecular Weight | 2878.17 |
| Exact Mass | 2895.2273 |
| SMILES | O.O[Si](O)(O)O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O |
| InChIKey | ACTPFSYIGLFGLY-UHFFFAOYSA-N |
| InChI | InChI=1S/H4O4Si.H2O.36O.12W/c1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h1-4H;1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| PubChem CID | 91667950 |
| UN Number | UN3260 |
| REACH Code | Y110 |
| HTS Code | 28111961 |
| Tariff Code | 2811198090 |
Safety & GHS
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Corrosive
GHS05
-
Health Hazard
GHS07
Hazard statements
- H314 (sub cat. 1C) Causes severe skin burns and eye damage
- H318 Causes serious eye damage
- H335 May cause respiratory irritation
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Irish, Italian, Portuguese, Russian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Silicotungstic acid hydrate
Frequently asked questions
What is tungstosilicic acid hydrate commonly used for?
It is primarily used as a catalyst in organic synthesis, a mordant in dyeing, and in the production of pigments, ceramics, and some specialty chemicals.
What is the chemical formula and molecular weight of tungstosilicic acid hydrate?
The formula is **H₄[Si(W₃O₁₀)₄] · xH₂O**, and the molecular weight is **2878.17 g/mol** (anhydrous basis).
How should tungstosilicic acid hydrate be stored?
Store in a tightly sealed container at **ambient temperature**, away from moisture and incompatible substances.
What grades of tungstosilicic acid hydrate does Molekula supply?
We supply **technical-grade tungstosilicic acid hydrate** suitable for industrial and research applications.
Can Molekula supply tungstosilicic acid hydrate in bulk quantities?
Yes, we offer bulk packaging options—please contact us for specific quantities and pricing.
What documentation comes with an order of tungstosilicic acid hydrate?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a product specification sheet.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.