Calcium tungstate
- CAS No.
- 7790-75-2
- Chemical Name:
- Calcium tungstate
- Synonyms
- CALC;EFHA3;CBARA1;ara CALC;DKFZp564C246;Allergen=Hom s 4;CALCIUM TUNGSTATE;calcium wolframate;Calciumtungstenoxi;CALCIUM BIPHOSPHATE
- CBNumber:
- CB6135863
- Molecular Formula:
- CaO4W
- Molecular Weight:
- 287.92
- MDL Number:
- MFCD00010913
- MOL File:
- 7790-75-2.mol
| Melting point | 1620°C |
|---|---|
| Density | 6.06 g/mL at 25 °C (lit.) |
| storage temp. | -20°C |
| solubility | Insoluble in H{2}O. Decomposes by hot HCl, HNO{3} |
| form | Powder |
| Specific Gravity | 6.062 |
| color | white |
| Water Solubility | insoluble H2O; decomposed by hot HCl, HNO3 [MER06] |
| Merck | 14,1712 |
| Solubility Product Constant (Ksp) | pKsp: 8.06 |
| Exposure limits |
ACGIH: TWA 3 mg/m3 NIOSH: TWA 5 mg/m3; STEL 10 mg/m3 |
| CAS DataBase Reference | 7790-75-2(CAS DataBase Reference) |
| FDA UNII | 90E3PV880Q |
| EPA Substance Registry System | Calcium tungsten oxide (CaWO4) (7790-75-2) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315-H319-H335 | |||||||||
| Precautionary statements | P261-P280-P271 | |||||||||
| WGK Germany | 3 | |||||||||
| TSCA | Yes | |||||||||
| HS Code | 28418030 | |||||||||
| NFPA 704 |
|
Calcium tungstate price More Price(14)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 248665 | Calcium tungstate powder | 7790-75-2 | 100g | $200 | 2024-03-01 | Buy |
| Sigma-Aldrich | SAB1304787 | ANTI-CBAA1 (N-TERM) antibody produced in rabbit IgG fraction of antiserum, buffered aqueous solution | 7790-75-2 | 400μl | $481 | 2024-03-01 | Buy |
| Sigma-Aldrich | 248665 | Calcium tungstate powder | 7790-75-2 | 500g | $702 | 2024-03-01 | Buy |
| Alfa Aesar | 013051 | Calcium tungsten oxide, 98% | 7790-75-2 | 100g | $68.65 | 2024-03-01 | Buy |
| Alfa Aesar | 013051 | Calcium tungsten oxide, 98% | 7790-75-2 | 25g | $37.5 | 2023-06-20 | Buy |
Calcium tungstate Chemical Properties,Uses,Production
Chemical Properties
-325 mesh, 10μm or less 99.9% pure; occurs in nature as mineral scheelite; white tetr powder(s), a=0.524 nm, c=1.138 nm; can be prepared by heating tungstic acid and CaO or CaCO3; used in tumor treatment and in luminous paint [KIR83] [STR93] [MER06]
Uses
Calcium tungstate can be ued for preparing screens for x-ray observations and photographs; in luminous paints; in scintillation counters.
Uses
Calcium tungsten oxide is used as a luminophore.
Application
Calcium tungstate is well known as the phosphor that emits light in λ: 310–700 nm under the excitation light in λ: 220–300 nm. The peak wavelength is positioned at 440 nm, causing it to give off a blue color.
Production Methods
A single crystal is grown from melt by the Czochralski method. Rare earth ions are easy to incorporate into the crystal during growth. Fluorescent films are deposited on a glass substrate through vacuum evaporation using a W filament heated at 2000℃ for about 3 min, followed by thermal annealing in oxygen at 550℃ for 2 h. The film becomes crystalline through this thermal annealing.
General Description
Calcium tungstate (CaWO4) is an optical material, which can be used as a laser host material for a variety of electronic applications. It has a scheelite structure with luminescence, and thermo-luminescence properties.
Flammability and Explosibility
Not classified
Structure and conformation
The space lattice of CaWO4 belongs to the tetragonal system, and its Scheelite structure has lattice constants of a=0.524 nm and c=1.138 nm. The space group is I41/a, and there are four formula units per unit cell.
Calcium tungstate Preparation Products And Raw materials
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hebei Mojin Biotechnology Co., Ltd | +8613288715578 | sales@hbmojin.com | China | 12456 | 58 |
| Henan Fengda Chemical Co., Ltd | +86-371-86557731 +86-13613820652 | info@fdachem.com | China | 7845 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21691 | 55 |
| Hubei xin bonus chemical co. LTD | 86-13657291602 | linda@hubeijusheng.com | CHINA | 22968 | 58 |
| Chongqing Chemdad Co., Ltd | +86-023-61398051 +8613650506873 | sales@chemdad.com | China | 39916 | 58 |
| career henan chemical co | +86-0371-86658258 15093356674; | factory@coreychem.com | China | 29826 | 58 |
| Shaanxi Dideu Medichem Co. Ltd | 18192627656 | 1012@dideu.com | China | 3422 | 58 |
| Zhengzhou Alfa Chemical Co.,Ltd | +8618530059196 | sale04@alfachem.cn | China | 12468 | 58 |
| Hefei TNJ Chemical Industry Co.,Ltd. | 0551-65418671 | sales@tnjchem.com | China | 34572 | 58 |
| ANHUI WITOP BIOTECH CO., LTD | +8615255079626 | eric@witopchemical.com | China | 23556 | 58 |
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View Lastest Price from Calcium tungstate manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2023-12-23 | Calcium tungstate
7790-75-2
|
US $50.00-1.00 / KG | 1KG | 99% | g-kg-tons, free sample is available | Henan Fengda Chemical Co., Ltd | |
 |
2023-09-23 | Calcium tungstate
7790-75-2
|
US $0.00 / KG | 1KG | 99% | 50000KG/month | Hebei Mojin Biotechnology Co., Ltd | |
 |
2023-09-06 | Calcium tungstate
7790-75-2
|
US $0.00-0.00 / KG | 1KG | 99% | 500000kg | Hebei Guanlang Biotechnology Co., Ltd. |
-
- Calcium tungstate
7790-75-2
- US $50.00-1.00 / KG
- 99%
- Henan Fengda Chemical Co., Ltd
-
- Calcium tungstate
7790-75-2
- US $0.00 / KG
- 99%
- Hebei Mojin Biotechnology Co., Ltd
-
- Calcium tungstate
7790-75-2
- US $0.00-0.00 / KG
- 99%
- Hebei Guanlang Biotechnology Co., Ltd.