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Tel.: +49 (0) 9560 8073020 E-Mail: service@heavy-liquid.com

Sodium polytungstate produced in-house

Direct distribution of SPT-0 to SPT-5 from TC-Tungsten Compounds

As the patent holder and producer of sodium polytungstate, TC-Tungsten Compounds offers the chemical in various forms. The range of products we manufacture in-house includes:

SPT-0

Sodium polytungstate as a fine, white powder, particularly low in carbon and nitrogen.

SPT-0L

SPT 0 in liquid form as a ready-to-use solution, extremely high-purity (filtered via glass filters) and available in any density up to 3,0 g/cm³, newly developed.

SPT-1

Sodium polytungstate fine, crystalline

SPT-2

Sodium polytungstate as a granulate with low dust content, less clumping when dissolving 

SPT-3

Sodium polytungstate as a ready-made, highly transparent, yellowish-green solution, available in densities of up to 3.0 g/cm³ (standard density: 2.82 g/cm³ ∓ 0.02 g/cm³)

SPT-4

Sodium polytungstate/tungsten carbide suspension (opaque, black), available in densities of 3.2 g/cm³ to 4.6 g/cm³

SPT-5

Sodium polytungstate as a ready-made, highly transparent, light-coloured solution, available in densities of up to 3.0 g/cm³ (standard density: 2.82 g/cm³ ∓ 0.02 g/cm³), highly stabilised for metallic samples

LVP-3   (NEW – pilot phase)

Low Viscosity Polytungstate solution as a transparent, almost colourless ready-to-use liquid, available with  density 2.95 g/cm³ ± 0.02g/cm³ and viscosity 15 mPas

AMT-3

Ammonium metatungstate solution ((NH4)6H2W12O40 • xH2O, CAS 12028-48-7 & 12333-11-8) as a transparent, almost colourless ready-to-use liquid, available in any density up to 2.3 g/cm³ ± 0.02g/cm³

Properties of sodium polytungstate

Sodium polytungstate is a relatively new agent for the production of heavy liquids, which offers substantial advantages over zinc chloride or highly toxic halogen hydrocarbons in sink-float analyses. It dissolves very well in water and can be configured as a pH-neutral solution. The maximum density of the solution is 3.1 g/cm³ at 25°.

NameSodium polytungstate
FormulaNa6[H2W12O6] or 3Na2WO4•9WO3•H2O
Molar mass2986,13 g/mol
CAS No.12141-67-2, 12333-13-0
REACH Reg. No.01-2120061128-61-0000
EC No.412-770-9
SynonymsSodium metatungstate, hexa-sodium tungstate, SPT
ApplicationsSodium polytungstate is used to produce a heavy liquid for analytical purposes, e.g. sink-float analyses or density gradient centrifugation

Safety and technical data sheets for our in-house products are available upon request. Please do not hesitate to contact us should you require this information.

Ordering sodium polytungstate

Sodium polytungstate is generally ordered as a ready-made aqueous solution with a density of 2.82 ± 0.02 g/cm³ or in densities ≥ 3.0 g/cm³, in 1 kg, 5 kg, 10 kg and 25 kg quantities. However, sodium polytungstate can also be ordered in crystalline form or as a granulate in 1 kg, 5 kg, 10 kg and 25 kg quantities.

You can order directly from us from anywhere in the world or, alternatively, you can place an order via one of our country representatives. No minimum order quantity applies.