Tungstic acid
Also known as: Dihydrogen wolframate, Dihydroxy(dioxo)tungsten, EINECS 231-975-2, MFCD00011336, O2W(OH)2, Orthotungstic acid, Tungstate (WO42-), dihydrogen, (T-4)-, Tungstate,dihydrogen,(T-4)-, Tungsten, dihydroxydioxo-, Tungstic(VI) acid, Tunstic acid, Wolframic acid, dihydrogen,(T-4)-Tungstate, dihydroxidodioxidotungsten, dihydroxy-dioxotungsten, tungstic acid
Tungstic acid (CAS 7783-03-1) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula H2O4W and a molecular weight of 249.854 g/mol. Key properties include a melting point of 100°C (dec.), a boiling point of 1473°C, a density of 5.5 g/mL at 25 °C(lit.) and a flash point of 1473°C. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.
- CAS No.
- 7783-03-1
- Jingsj CID
- J-24256-9
- Molecular Formula
- H2O4W
- Molecular Weight
- 249.854 g/mol
- Category
- Inorganic Chemicals
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | 99.9% 500g | - | - | CN China MOQ 500g | |
Made to Order | 99.9% 1kg | - | - | CN China MOQ 1kg | |
Made to Order | 99.9% 25kg | - | - | CN China MOQ 25kg |
Physicochemical Properties
| Melting Point | 100°C (dec.) |
|---|---|
| Boiling Point | 1473°C |
| Density | 5.5 g/mL at 25 °C(lit.) |
| Flash Point | 1473°C |
| Exact Mass | 249.946213 |
| PSA | 74.60000 |
| Refractive Index | 2.24 |
| Additional Property | insoluble |
Frequently Asked Questions
What is the CAS number of Tungstic acid?
The CAS number of Tungstic acid is 7783-03-1.
What are the molecular formula and molecular weight of Tungstic acid?
Tungstic acid has molecular formula H2O4W and molecular weight 249.854 g/mol.
Which suppliers offer Tungstic acid?
1 supplier(s) listed; request a quote for pricing.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Tungstic acid (CAS 7783-03-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-24256-9 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.