ChemicalBook > CAS DataBase List > Calcium tungstate
Calcium tungstate
- Product Name
- Calcium tungstate
- CAS No.
- 7790-75-2
- Chemical Name
- Calcium tungstate
- Synonyms
- CALC;EFHA3;MPXPS;CBARA1;ara CALC;DKFZp564C246;Allergen=Hom s 4;CALCIUM TUNGSTATE;calcium wolframate;Calciumtungstenoxi
- CBNumber
- CB6135863
- Molecular Formula
- CaO4W
- Formula Weight
- 287.92
- MOL File
- 7790-75-2.mol
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Calcium tungstate Property
- 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
- biological source
- rabbit
- 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)
- EPA Substance Registry System
- Calcium tungsten oxide (CaWO4) (7790-75-2)
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Safety
- WGK Germany
- 3
- TSCA
- Yes
- HS Code
- 28418030
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Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
- Precautionary statements
-
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
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N-Bromosuccinimide Price
Sigma-Aldrich
- Product number
- 248665
- Product name
- Calcium tungstate
- Purity
- powder
- Packaging
- 100g
- Price
- $208
- Updated
- 2025/07/31
Sigma-Aldrich
- Product number
- SAB1304787
- Product name
- ANTI-CBAA1 (N-TERM) antibody produced in rabbit
- Purity
- IgG fraction of antiserum, buffered aqueous solution
- Packaging
- 400μl
- Price
- $496
- Updated
- 2025/07/31
Sigma-Aldrich
- Product number
- 248665
- Product name
- Calcium tungstate
- Purity
- powder
- Packaging
- 500g
- Price
- $728
- Updated
- 2025/07/31
Strem Chemicals
- Product number
- 20-2052
- Product name
- Calcium tungstate, 98%
- Packaging
- 100g
- Price
- $57
- Updated
- 2024/03/01
Strem Chemicals
- Product number
- 20-2052
- Product name
- Calcium tungstate, 98%
- Packaging
- 500g
- Price
- $181
- Updated
- 2024/03/01
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Calcium tungstate Chemical Properties,Usage,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
Raw materials
Tungsten trioxide
Calcium oxide
Alkali Metals, plasma standard solution, Specpure, Ba,Be,Ca,Cs,K,Li,Mg,Na,Rb,Sr, 100μg/ml
Sodium tungstate dihydrate
Calcium hydroxide
Preparation Products
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View Lastest Price from Calcium tungstate manufacturers
Hebei Chuanghai Biotechnology Co., Ltd
- Product
- Calcium tungstate 7790-75-2
- Price
- US $0.00-0.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 500000kg
- Release date
- 2024-10-28
Henan Fengda Chemical Co., Ltd
- Product
- Calcium tungstate 7790-75-2
- Price
- US $50.00-1.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- g-kg-tons, free sample is available
- Release date
- 2023-12-22
Career Henan Chemical Co
- Product
- Calcium tungstate 7790-75-2
- Price
- US $1.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 1000KGS
- Release date
- 2019-12-31
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