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]
Large orange octahedral scheelite, Ca(WO4), crystal to 4.5 cm on muscovite, KAl2(AlSi3O10)(OH)2. Pingwu Co., Mianyang pref.,
Sichuan prov., China.
Uses
Calcium tungsten oxide is used as a luminophore.
Uses
Calcium tungstate can be ued for preparing screens for x-ray observations and photographs; in luminous paints; in scintillation counters.
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.
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 | +86 13288715578 +8613288715578 | sales@hbmojin.com | China | 12446 | 58 |
Henan Fengda Chemical Co., Ltd | +86-371-86557731 +86-13613820652 | info@fdachem.com | China | 20291 | 58 |
Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21667 | 55 |
Hubei xin bonus chemical co. LTD | 86-13657291602 | linda@hubeijusheng.com | CHINA | 22968 | 58 |
Chongqing Chemdad Co., Ltd | +86-023-6139-8061 +86-86-13650506873 | sales@chemdad.com | China | 39916 | 58 |
career henan chemical co | +86-0371-86658258 +8613203830695 | factory@coreychem.com | China | 29822 | 58 |
Zhengzhou Alfa Chemical Co.,Ltd | +8618530059196 | sale04@alfachem.cn | China | 13363 | 58 |
Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418671 +8618949823763 | sales@tnjchem.com | China | 34571 | 58 |
ANHUI WITOP BIOTECH CO., LTD | +8615255079626 | eric@witopchemical.com | China | 23555 | 58 |
Shaanxi Dideu Medichem Co. Ltd | +86-029-89586680 +86-18192503167 | 1026@dideu.com | China | 7930 | 58 |
Related articles
- Preparation and Toxicity of Calcium tungstate
- Calcium tungstate is used for fluorescent paint, photographically-used optical screen tubes, medicine, X-ray photographs and f....
- Oct 22,2019
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.