There are no specific recommendations on the concentration of Sodium phosphotungstate solution to prepare in order to achieve a given refractive index. In general the refractive index should increase as the concentration of the Sodium polytungstate increases. The solvent used and the solution's temperature can also affect refractive index values.
Przejdź do
71913
Sodium polytungstate
purum p.a., for the preparation of heavy liquid, ≥85% WO3 basis
Synonim(y):
Sodium metatungstate, hexa-Sodium tungstate (W12)
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| Rozmiar/SKU | Dostępność | Cena netto |
|---|---|---|
25 g | Skontaktuj się z Obsługą Klienta, aby uzyskać informacje na temat dostępności | 520,00 zł |
100 g | Skontaktuj się z Obsługą Klienta, aby uzyskać informacje na temat dostępności | 1570,00 zł |
Informacje o tej pozycji
Wzór liniowy:
3Na2WO4 · 9WO3 · H2O
Numer CAS:
Masa cząsteczkowa:
2986.01
NACRES:
NA.75
PubChem Substance ID:
UNSPSC Code:
12352207
EC Number:
412-770-9
MDL number:
520,00 zł
Skontaktuj się z Obsługą Klienta, aby uzyskać informacje na temat dostępności
Pomoc techniczna
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Pozwól nam pomócgrade
purum p.a.
Quality Segment
assay
≥85% WO3 basis
form
powder or crystals
quality
for the preparation of heavy liquid
technique(s)
titration: suitable
color
white to off-white
pH
3 (20 °C)
density
3.1 g/cm3 at 20 °C (saturated aqueous solution)
application(s)
diagnostic assay manufacturing
hematology
histology
storage temp.
room temp
SMILES string
[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O
InChI
1S/6Na.39O.12W/q6*+1;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;6*-1;;;;;;;;;;;;
InChI key
AZCSOJKJFMWYCX-UHFFFAOYSA-N
Application
Sodium polytungstate (SPT) is widely used to produce heavy liquid for sink /float analysis (gravity separation) and density gradient centrifugation due to its very high solubility in water.
Other Notes
A new medium for density-gradient centrifugation, the density can be adjusted to up to 3.1 g/mlcitationcitation
A new medium for density-gradient centrifugation, the density can be adjusted to up to 3.1 g/ml
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Ta pozycja | |||
|---|---|---|---|
| description purum p.a., for the preparation of heavy liquid, ≥85% WO3 basis | description ~85% in H2O | description powder | description wire reel, 20m, diameter 0.1mm, gold plated, 99.95% |
| grade purum p.a. | grade - | grade - | grade - |
| technique(s) titration: suitable | technique(s) centrifugation: suitable | technique(s) - | technique(s) - |
| color white to off-white | color cream white, | color - | color - |
| form powder or crystals | form solution | form powder | form wire |
| application(s) diagnostic assay manufacturing | application(s) general analytical | application(s) - | application(s) - |
| Quality Level 100 | Quality Level - | Quality Level 100 | Quality Level - |
Słowo ostrzegawcze
Danger
Kody zagrożeń
Hazard Classifications
Acute Tox. 4 Oral - Aquatic Chronic 3 - Eye Dam. 1
Klasa składowania
11 - Combustible Solids
Co się dzieje?
WGK 2
Temperatura zapłonu (°F)
Not applicable
Temperatura zapłonu (°C)
Not applicable
PPE (środki ochrony indywidualnej)
dust mask type N95 (US), Eyeshields, Gloves
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Dokumenty związane z niedawno zakupionymi produktami zostały zamieszczone w Bibliotece dokumentów.
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How can I modify the refractive index of water with sodium polytugnsten to achieve a value around 1.5 within a temperature range of 10-40°C? is there a table or somewhere to look how the refraction index changes with the concentration of the solution?
1 answer-
Helpful?
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What is the purity of this product? Will there be C or N contamination?
1 answer-
This product is an 85% solution. The purity and trace elements is not determined. The concentration is verified by gravimetric analysis, which is reported in the lot specific Certificate of Analysis. Please see the link below to review a sample or lot specific certificate:
https://www.sigmaaldrich.com/product/sigma/71913#product-documentationHelpful?
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I would like to ask how and how much grams do I need to prepare 1200 ml solution at a density of 1.6g/cm3
1 answer-
Sodium Polytungstenate (SPT) has not been investigated for use in the preparation of heavy liquids. A brief search of the literature reveals information that may be helpful. The maximum achievable density, 3.10 g/cm³, is prepared from 133 g of SPT in 22 grams of deionized water at 20°C. A density of 1.56 g/cm³ may be prepared from 35.01 g of SPT in 42.94 grams of deionized water. A density of 1.73 g/cm³ may be prepared from 45.15 g of SPT in 41.10 grams of deionized water. Using the same ratios and adjusting the volume of water or the amount of SPT experimentally, would be the best method to achieve a specific volume at the desired density of 1.6 g/cm³.
Helpful?
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