Skip to Content
Merck
All Photos(1)

Key Documents

View All Documentation

Safety Information

71913

Sigma-Aldrich

Sodium polytungstate

purum p.a., for the preparation of heavy liquid, for sink-float analysis, ≥85% WO3 basis

Synonym(s):

Sodium metatungstate, hexa-Sodium tungstate (W12)

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

Linear Formula:
3Na2WO4 · 9WO3 · H2O
CAS Number:
12141-67-2
Molecular Weight:
2986.01
EC Number:
412-770-9
MDL number:
MFCD00061466
UNSPSC Code:
12352207
PubChem Substance ID:
329763629
NACRES:
NA.75

grade

for sink-float analysis
purum p.a.

Quality Level

100

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

Related Categories

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/ml

Pictograms

CorrosionExclamation mark
GHS05,GHS07

Signal Word

Danger

Hazard Statements

H302,H318,H412

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Chronic 3 - Eye Dam. 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

71913-25G:4548173945903
71913-100G:4548173945897
71913-VAR:
71913-BULK:

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
BCCG9333
BCCB8708
BCBZ8832
BCBW3566
BCBT6243

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Matthias Rothe et al.
PloS one, 10(11), e0143737-e0143737 (2015-11-26)
An increasing number of studies constrain the importance of iron for the long-term retention of phosphorus (P) under anoxic conditions, i.e. the formation of reduced iron phosphate minerals such as vivianite (Fe3(PO4)2⋅8H2O). Much remains unknown about vivianite formation, the factors
M.R. Gregory et al.
N.Z. J. Geol. Geophys., 30, 317-317 (1987)
The use of low-toxic heavy suspensions in mineral sands evaluation and zircon fractionation.
Koroznikova L, et al.
Journal of the South African Veterinary Association, 25-33 (2008)
B. Plewinsky et al.
Makromol. Chem., 185, 1429-1429 (1984)
Gregory M Hayes et al.
American journal of translational research, 7(6), 1181-1188 (2015-08-19)
Soft tissue sarcoma (STS) is a heterogenous tumor arising from the embryonic mesoderm represented by approximately 50 histological subtypes. Effective therapeutic intervention is lacking for recurrent, late stage and metastatic disease. CD39, a cell-surface ectonucleotidase, has previously been shown to
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service