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P4006

Sigma-Aldrich

Phosphotungstic acid hydrate

Phosphotungstic acid hydrate
1 of 2 reviewers received a sample product or took part in a promotion

reagent grade

Synonym(s):

Tungstophosphoric acid

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About This Item

Linear Formula:
H3[P(W3O10)4] · xH2O
CAS Number:
12501-23-4
Molecular Weight:
2880.05 (anhydrous basis)
MDL number:
MFCD00149915
UNSPSC Code:
12352300
PubChem Substance ID:
24898480
NACRES:
NA.21
Pricing and availability is not currently available.

grade

reagent grade

Quality Level

200

form

powder

mp

~95 °C (lit.)

SMILES string

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=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.OP(O)(O)=O

InChI

1S/H3O4P.H2O.36O.12W/c1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h(H3,1,2,3,4);1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

InChI key

AVFBYUADVDVJQL-UHFFFAOYSA-N

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General description

Phosphotungstic acid hydrate is a heteropolyacid.[1]

Application

Phosphotungstic acid hydrate may be used as a staining agent for the transmission electron microscope (TEM) imaging of cetyltrimethylammonium bromide (CTAB) coated gold nanorods.[2]
It may be used in the preparation of:
  • Phosphotungstic acid doped ormosil hybrid networks.[3]
  • Niobia supported phosphotungstic acid (PTA) catalysts.[4]
  • Titanium dioxide (TiO2) nanoparticles /phosphotungstic acid (HPW) films.[5]

Signal Word

Danger

Hazard Statements

H302,H314,H411

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1C

Storage Class Code

8A - Combustible corrosive hazardous materials

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000392555
0000392556
0000385573
0000385116
0000385117

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Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid.
Ullah S, et al.
Applied Surface Science, 277, 111-120 (2013)
Preparation, characterization and photochromic behavior of phosphotungstic acid-ormosil nanocomposites.
Ferreira-Neto EP, et al.
Materials Chemistry and Physics, 153, 410-421 (2015)
Tanja Schulz-Mirbach et al.
Frontiers in zoology, 10(1), 63-63 (2013-10-29)
While a number of studies have illustrated and analyzed 3D models of inner ears in higher vertebrates, inner ears in fishes have rarely been investigated in 3D, especially with regard to the sensory epithelia of the end organs, the maculae.
Vapor Phase Dehydration of Glycerol to Acrolein Over Phosphotungstic Acid Catalyst Supported on Niobia.
Viswanadham B, et al.
Catalysis Letters, 144(4), 744-755 (2014)
Fabrication and characterization of heteropolyacid (H3PW12O40)/directly polymerized sulfonated poly (arylene ether sulfone) copolymer composite membranes for higher temperature fuel cell applications.
Kim YS, et al.
Journal of Membrane Science , 212(1), 263-282 (2003)
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Protocols

Enzymatic Assay of Neuraminidase

Enzymatic Assay of Neuraminidase applies to products that have a specification for neuraminidase content by enzymatic determination.

2 Reviews This action will navigate to reviews.

Questions

1–3 of 3 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  3. Which type of phosphotungstic acid (P4006 or 79690) is recommended for the electron microscopic (TEM) staining of synaptic proteins, as mentioned in Bloom and Aghajanian, J. Ultrastructural Research, 22, 361-375 (1968)?

    1 answer

    1. Product P4006 is labeled as a "Reagent Grade" chemical, while Product 79690 is described as suitable "For Microscopy." Both products have not been tested for general use in histology or electron microscopy. Considering the substantial similarity between the two products, it is expected that both products could be utilized for TEM electron microscopy. If one of the products is on backorder, it is recommended to order the available product.

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Reviews

1 of 2 reviewers received a sample product or took part in a promotion
1–2 of 2 Reviews  

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    • Review 1
    • Votes 0
    5 out of 5 stars.

    Used as a uCT contrasting agent

    works very well for this purpose. did not have to amend an animal protocol to conduct in vivo imaging with conventional in vivo contrasting agents. all I had to do was dissolve this in ethanol and treat my fixed and partially dehydrated mouse embryos for a few days and i received excellent contrast under uCT first attempt

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  2. Panum institute Copenhagen university
    • Reviews 2
    • Votes 0
    5 out of 5 stars.

    lab manager

    I use this material to decal our staining machine. very good and effective.

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