79690

Phosphotungstic acid hydrate

for microscopy

• Synonym(s): Tungstophosphoric acid
• Linear Formula: H₃[P(W₃O₁₀)₄] · xH₂O
• CAS Number: 12501-23-4
• Molecular Weight: 2880.05 (anhydrous basis)
• MDL number: MFCD00149915
• UNSPSC Code: 12171500
• PubChem Substance ID: 329768557
• NACRES: MA.02

Properties

• grade: for microscopy
• Quality Level: 200
• form: powder or crystals
• impurities: ≤0.002% total nitrogen (N)
• loss: ≤15% loss on drying
• pH: 2 (20 °C)
• mp: ~95 °C (lit.)
• solubility: water: 0.5 g/10 mL, clear, colorless
• anion traces: chloride (Cl^-): ≤50 mg/kg; sulfate (SO₄^2-): ≤100 mg/kg
• 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
• application(s): diagnostic assay manufacturing; hematology; histology
• storage temp.: room temp
• 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

Description

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.

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
2. Niobia supported phosphotungstic acid (PTA) catalysts
3. Titanium dioxide (TiO2) nanoparticles /phosphotungstic acid (HPW) films.

Other Notes

Review of the folin phenol method for the quantitative determination of proteins

Safety Information

• Pictograms: GHS05,GHS07,GHS09
• Signal Word: Danger
• Hazard Statements: H302 - H314 - H411
• Precautionary Statements: P260 - P273 - P280 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Oral - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1C
• Storage Class Code: 8B - Non-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