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Phosphotungstic acid hydrate

SIAL/79690 - for microscopy

Synonym: Tungstophosphoric acid

CAS Number: 12501-23-4
Empirical Formula (Hill Notation): H3O40PW12 · xH2O
Molecular Weight: 2880.05 (anhydrous basis)
MDL Number: MFCD00149915
Linear Formula: H3[P(W3O10)4] · xH2O
Product Type: Chemical

Catalog Number PKG Qty. Price Quantity
45-79690-25G 25 g
$79.30
1/EA
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45-79690-100G 100 g
$267.00
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45-79690-500G 500 g
$830.00
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anion traces chloride (Cl-): ≤50 mg/kg
  sulfate (SO42-): ≤100 mg/kg
application(s) diagnostic assay manufacturing
hematology
histology
cation traces Ca: ≤20 mg/kg
  Cu: ≤5 mg/kg
  Fe: ≤20 mg/kg
  K: ≤50 mg/kg
  Na: ≤50 mg/kg
  Pb: ≤20 mg/kg
  Zn: ≤5 mg/kg
form powder or crystals
grade for microscopy
impurities ≤0.002% total nitrogen (N)
InChI 1S/H3O4P.H2O.36O.12W/c1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h(H3,1,2,3,4);1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
InChI key AVFBYUADVDVJQL-UHFFFAOYSA-N
loss ≤15% loss on drying
mp ~95 °C (lit.)
pH 2 (20 °C)
Quality Level 200 
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
solubility water: 0.5 g/10 mL, clear, colorless
storage temp. room temp
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:
  1. Phosphotungstic acid doped ormosil hybrid networks
    •  Niobia supported phosphotungstic acid (PTA) catalysts
    • Titanium dioxide (TiO2) nanoparticles /phosphotungstic acid (HPW) films.
General description: Phosphotungstic acid hydrate is a heteropolyacid.It is a reagent suitable to detect alkaloids and nitrogenous bases. It is suitable for manufacturing organic pigments, and additives in the plating industry. It is known to impart water resistance to plastics, adhesives, and cement. It also is suitable as a catalyst for organic reactions.
Other Notes: Review of the folin phenol method for the quantitative determination of proteins
mp ~95 °C (lit.)
Storage Temp. room temp
UNSPSC 12171500

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