Sodium polytungstate hydrate, 1 kg
Molar mass (M) 2986,01 g/mol
Density (D) 5,47 g/cm³
WGK 2
CAS No. [12141-67-2]
EG-Nr. 412-770-9
CHF875.00/Pack Qty.
excl. VAT. | 1 kg per Pack Qty.
Art. No. 8828.3
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Product details
Sodium polytungstate (SPT) is perfect for preparation of heavy liquids. Carl ROTH offers an environmentally friendly alternative to using zinc chloride and mercury saline solutions or highly toxic halogenated hydrocarbons to conduct the sink or swim analyses required for density determination.
- Highly water soluble
- pH-neutral solution
- Maximum achievable density of the solution is 3,1 g/cm³ at 25 °C
- Non-toxic
- Non-flammable
- Odourless
- Low viscosity
- Easy to use
- Extremely easy to clean the sinks and floats with water
- Environmentally friendly
Manufacture of aqueous sodium polytungstate solutions with the following densities and consequent viscosities at 25 °C
| Mass of SPT used [g] | Masse of H2O [g] | End volume of solution [ml] | Concentration c in [Gew.-%] | Density p [g/cm3] | Viskosität η [mPa•s] |
| 5,00 | 48,80 | 50 | 9,3 | 1,08 | 0,99 |
| 10,00 | 47,66 | 50 | 17,3 | 1,15 | 1,05 |
| 15,08 | 46,63 | 50 | 24,4 | 1,23 | 1,13 |
| 20,00 | 45,87 | 50 | 30,4 | 1,32 | 1,19 |
| 25,02 | 44,98 | 50 | 35,7 | 1,40 | 1,29 |
| 35,01 | 42,94 | 50 | 44,9 | 1,56 | 1,51 |
| 45,15 | 41,10 | 50 | 52,3 | 1,73 | 1,83 |
| 55,01 | 38,93 | 50 | 58,6 | 1,88 | 2,27 |
| 65,17 | 36,99 | 50 | 63,8 | 2,04 | 2,90 |
| 75,00 | 34,68 | 50 | 68,4 | 2,19 | 3,93 |
| 85,00 | 32,54 | 50 | 72,3 | 2,35 | 5,15 |
| 95,00 | 30,10 | 50 | 75,9 | 2,50 | 8,19 |
| 105,01 | 28,42 | 50 | 78,7 | 2,67 | 12,18 |
| 115,01 | 25,92 | 50 | 81,6 | 2,82 | 20,55 |
| 125,12 | 23,72 | 50 | 84,1 | 2,98 | 36,65 |
| 133,00 | 22,00 | 50 | 85,8 | 3,10 | 59,52 |
Sodium polytungstate hydrate ≥99,9 %
- Subtotal: 0.00
| Order No. | Pack Qty. | Pack. | Price | Quantity | ||
|---|---|---|---|---|---|---|
| 8828.1 | 50 g | plastic | CHF67.90 |
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| 8828.2 | 250 g | plastic | CHF248.50 |
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| 8828.3 | 1 kg | plastic | CHF875.00 |
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- Subtotal: 0.00
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General information
Carl ROTH also offers reagents suitable for food analysis.
On the following pages, you will find the determination of
• Nitrogen according to Kjeldahl
• Sugar
• Mercury
• Trichinae
• Fat
and the determination of the
• Iodine value
• Acid value
• Peroxide value
• Saponification value
as well as other determining factors such as
• Viscosity
• Density
• Hydroxyl value
• Fluoride ions
Sodium polytungstate (SPT) is perfect for preparation of heavy liquids. Carl ROTH offers an environmentally friendly alternative to using zinc chloride and mercury saline solutions or highly toxic halogenated hydrocarbons to conduct the sink or swim analyses required for density determination.Properties:
- Highly water soluble
- pH-neutral solution adjustable
- Maximum achievable density of the solution is 3,1 g/cm³ at 25 °C
- Non-toxic
- Non-flammable
- Odourless
- Low viscosity
- Easy to use
- Extremely easy cleaning of the sinking and floating material with water
- Environmentally friendly
Certificates of Analysis
Type analysis
| Assay | ≥99,9 % |
| Assay (WO3) | ≥85 % |
| Tubidity (density 2,80 g/ml) | <10 NTU |
| Max. attainable density (25 °C) | <3,1 g/ml |