455970

Phosphotungstic acid hydrate

99.995% trace metals basis (Purity excludes up to 300 ppm Si)

• 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: 12352302
• PubChem Substance ID: 24869099
• NACRES: NA.23

Properties

• assay: 99.995% trace metals basis (Purity excludes up to 300 ppm Si)
• form: powder or crystals
• technique(s): blocking: suitable
• impurities: ≤55.0 ppm Trace Metal Analysis
• 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

Description

Application

The acid selectively blocks dye components from staining the tissue by either binding to it or by acting as a mordant. It may be used a recyclable superacid catalyst for isomerization reaction of cycloalkanes. It may simply be used as an acid catalyst for the following reactions:

• Prins cyclization reaction
• dehydration of alcohols
• hydration of olefins.3

Phosphotungstic acid based membranes may be used for fuel cell applications.

Safety Information

• pictograms: GHS05,GHS07,GHS09
• signalword: Danger
• hcodes: H302,H314,H411
• pcodes: 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: 8B - Non-combustible corrosive hazardous materials
• wgk_germany: WGK 2
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges