Sodium polytungstate hydrate

≥99,9 %
For the preparation of heavy liquid.
Sodium metatungstate

Empirical formula 3 Na2WO4 · 9 WO3 · H2O
Molar mass (M) 2986,01 g/mol
Density (D) 5,47
Solubility >1000 g/l (H2O, 20 °C)
WGK 2
CAS-Nr. [12141-67-2]
EG-Nr. 412-770-9

Sodium polytungstate (SPT) is perfect for preparation of heavy liquids. 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
  • Maximum achievable density of the solution is 3,1 g/cm³ at 25 °C

Advantages:

  • 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]Mass of H2O [g]End volume of solution [ml]Concentration c in [wt.-%]Density p [g/cm3]Viscosity η [mPa•s]
5,0048,80509,31,080,99
10,0047,665017,31,151,05
15,0846,635024,41,231,13
20,0045,875030,41,321,19
25,0244,985035,71,401,29
35,0142,945044,91,561,51
45,1541,105052,31,731,83
55,0138,935058,61,882,27
65,1736,995063,82,042,90
75,0034,685068,42,193,93
85,0032,545072,32,355,15
95,0030,105075,92,508,19
105,0128,425078,72,6712,18
115,1725,925081,62,8220,55
125,1223,725084,12,9836,65
133,0022,005085,83,1059,52

Show more Show less

Hazard symbol  Hazard symbol 
Danger H302-H318-H412

Sodium polytungstate hydrate

Status Art. No. Pack Qty. Packaging Price Quantity Action
Item available in stock 8828.1 50 g plastic €44.65
Add to shopping basket
Close

Item added to your shopping basket.

Please insert a valid amount.

Item available at short notice 8828.2 250 g plastic €166.65
Add to shopping basket
Close

Item added to your shopping basket.

Please insert a valid amount.

Item available at short notice 8828.3 1 kg plastic €600.95
Add to shopping basket
Close

Item added to your shopping basket.

Please insert a valid amount.

Item available in stock Item available at short notice Item not available
Add to shopping basket

Technical information

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

CoAs

You can search and download here your CoA. Please enter the corresponding item number and batch number.

Search results

Following CoAs have been found:

Error

    Search CoA
    Demand CoA

    Fields marked * are mandatory.

    Request placed

    Your request of generating a CoA has been successfully completed.

    Choose Market

    Please choose your market and your language.

    save settings