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
- MOL File:
- 7790-75-2.mol
- Modify Date:
- 2024/5/31 14:07:17
| 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) |
| 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(11)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich(India) | 248665 | Calcium tungstate powder | 7790-75-2 | 100G | ₹14408.08 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | SAB1304787 | ANTI-CBAA1 (N-TERM) antibody produced in rabbit IgG fraction of antiserum, buffered aqueous solution | 7790-75-2 | 400μL | ₹47796.6 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 248665 | Calcium tungstate powder | 7790-75-2 | 500G | ₹28448.1 | 2022-06-14 | Buy |
| ALFA India | ALF-035669-30 | Calcium tungsten oxide, 99.78% (metals basis) | 7790-75-2 | 250g | ₹38358 | 2022-05-26 | Buy |
| ALFA India | ALF-035669-18 | Calcium tungsten oxide, 99.78% (metals basis) | 7790-75-2 | 50g | ₹7677 | 2022-05-26 | 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 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 | Inquiry |
|---|---|---|---|---|---|
| PERFECT CHEMICAL | +91-9820465461 +91-9820465461 | Mumbai, India | 391 | 58 | Inquiry |
| Kronox Lab Sciences Pvt Ltd | +91-9313231074 +91-9313231074 | Gujarat, India | 240 | 58 | Inquiry |
| Rubamin Limited | +91-2652282079 +91-2652282078 | Gujarat, India | 10 | 58 | Inquiry |
| Anchor Chemicals Industries | +91-9821232090 +91-9819947105 | Maharashtra, India | 16 | 58 | Inquiry |
| Otto Chemie Pvt. Ltd. | +91 9820041841 | Mumbai, India | 5873 | 58 | Inquiry |
| Alfa Aesar | 1 800 209 7001 | Maharashtra, India | 6913 | 58 | Inquiry |
| Central Drug House(P) Ltd. | 91-11-49404040 | New Delhi, India | 6160 | 58 | Inquiry |
| Triveni chemicals | 08048762458 | New Delhi, India | 6093 | 58 | Inquiry |
| PK Chlorochem Private Limited | 08048372472Ext 860 | Vadodara, India | 109 | 58 | Inquiry |
| Indiana Chem- Port | 08048976561 | Vadodara, India | 82 | 58 | Inquiry |
| Supplier | Advantage |
|---|---|
| PERFECT CHEMICAL | 58 |
| Kronox Lab Sciences Pvt Ltd | 58 |
| Rubamin Limited | 58 |
| Anchor Chemicals Industries | 58 |
| Otto Chemie Pvt. Ltd. | 58 |
| Alfa Aesar | 58 |
| Central Drug House(P) Ltd. | 58 |
| Triveni chemicals | 58 |
| PK Chlorochem Private Limited | 58 |
| Indiana Chem- Port | 58 |
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