This product has not been tested for this application. Literature indicates that phosphotungstic acid is used in the analysis of the degree of proteolysis of cheddar cheese through PTA soluble nitrogen.
P4006
Phosphotungstic acid hydrate
reagent grade
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Synonym(s):
Tungstophosphoric acid
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| Size/SKU | Availability | Price |
|---|---|---|
10 g | Check Cart for Availability | $59.00 |
25 g | Available to ship TODAYfromMILWAUKEE | $86.00 |
100 g | Available to ship TODAYfromMILWAUKEE | $295.00 $250.75 |
250 g | Check Cart for Availability | $649.00 |
500 g | Check Cart for Availability | $938.00 |
About This Item
Linear Formula:
H3[P(W3O10)4] · xH2O
CAS Number:
Molecular Weight:
2880.05 (anhydrous basis)
NACRES:
NA.21
PubChem Substance ID:
UNSPSC Code:
12352300
MDL number:
Form:
powder
Grade:
reagent grade
grade
reagent grade
Quality Segment
form
powder
pH
2 (20 °C)
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
General description
Phosphotungstic acid hydrate is a heteropolyacid.
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.
It may be used in the preparation of:
It may be used in the preparation of:
- Phosphotungstic acid doped ormosil hybrid networks.
- Niobia supported phosphotungstic acid (PTA) catalysts.
- Titanium dioxide (TiO2) nanoparticles /phosphotungstic acid (HPW) films.
1 of 1
This Item | |||
|---|---|---|---|
| description reagent grade | description suitable for microscopy | description 99.995% trace metals basis (Purity excludes up to 300 ppm Si) | description ≥99.99% trace metals basis |
| grade reagent grade | grade - | grade - | grade - |
| Quality Level 200 | Quality Level 200 | Quality Level 100 | Quality Level 100 |
| form powder | form powder or crystals | form powder or crystals | form crystals |
| pH 2 (20 °C) | pH 2 (20 °C) | pH - | pH - |
| mp ~95 °C (lit.) | mp ~95 °C (lit.) | mp ~95 °C (lit.) | mp - |
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signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 4 Oral - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1C
Storage Class
8A - Combustible corrosive hazardous materials
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
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Hi, I will analyse the degree of proteolysis of cheddar cheese. Is it the right chemical to analyse the PTA soluble nitrogen?
1 answer-
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
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/418/501/product-dating-information-06-25-mk.pdfHelpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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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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-
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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