Tungstic acid
Synonym(s):Tungstic(VI) acid
- CAS NO.：7783-03-1
- Empirical Formula: HO4W-
- Molecular Weight: 248.84
- MDL number: MFCD00011336
- EINECS: 231-975-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-01-27 09:38:02
What is Tungstic acid?
Chemical properties
light yellow powder
Physical properties
Yellow amorphous powder; density 5.59 g/cm3; decomposes at 100°C; insoluble in water and most acids; soluble in hydrofluoric acid, caustic alkalies and ammonia solution. Freshly prepared tungstic acid containing a molecule of water of crystallization is moderately soluble in water.
The Uses of Tungstic acid
Tungstic Acid is used as a starting material in the synthesis of polynanocomposite material and polycrystalline ceramics.
Definition
ChEBI: Tungstic acid is a tungsten coordination entity. It is a conjugate acid of a hydrogentungstate.
General Description
Tungstic acid may be prepared by either digesting tungstate of lime or by treating tungsten with hydrochloric acid. 1
Flammability and Explosibility
Not classified
Properties of Tungstic acid
| Melting point: | 100°C (dec.) |
| Boiling point: | 1473°C |
| Density | 5.5 g/mL at 25 °C (lit.) |
| refractive index | 2.24 |
| Flash point: | 1473°C |
| storage temp. | Sealed in dry,Room Temperature |
| solubility | insoluble in H2O, acid solutions; soluble in alkaline solutions |
| form | powder |
| color | Yellow to yellow-greenish |
| Specific Gravity | 5.5 |
| Water Solubility | insoluble |
| Merck | 14,9818 |
| Exposure limits | ACGIH: TWA 3 mg/m3 NIOSH: TWA 5 mg/m3; STEL 10 mg/m3 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| CAS DataBase Reference | 7783-03-1(CAS DataBase Reference) |
| NIST Chemistry Reference | Tungstic acid(7783-03-1) |
| EPA Substance Registry System | Tungstate (WO42-), dihydrogen, (T-4)- (7783-03-1) |
Safety information for Tungstic acid
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Tungstic acid
Tungstic acid manufacturer
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