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Sigma-Aldrich

Silicomolybdic acid solution

Synonym(s):

Keggin heteropoly acid

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About This Item

Linear Formula:
H4SiO4 · 12MoO3
CAS Number:
11089-20-6
MDL number:
MFCD00054151
UNSPSC Code:
12352301
PubChem Substance ID:
329762788
NACRES:
NA.22

form

liquid

Quality Level

100

refractive index

n20/D 1.376

density

1.156 g/mL at 25 °C

SMILES string

O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Si](O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](O)(=O)=O)(O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](O)(=O)=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](O)(=O)=O

InChI

1S/12Mo.O4Si.4H2O.32O/c;;;;;;;;;;;;1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h;;;;;;;;;;;;;4*1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/q;;;;8*+1;-4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/p-4

InChI key

LMAWUDMBHTZUCF-UHFFFAOYSA-J

Related Categories

Application

Reactant for:
  • Use in electrostatic synthesis of compounds comprising ultrathin layers of silicododecamolybdate anions and poly(allyl ammonium) cations
  • Preparation of charge transfer compounds with Keggin anions and 2,2′-biquinolinium
Silicomolybdic acid (Keggin Acid, SMA) can be used to prepare supported acid catalysts for various organic transformations. For example, it is used to prepare:
  • SMA immobilized on mesoporous silica spheres for hydrolysis of ammonia borane.
  • SMA doped carbon-ceramic composite electrodes for electrocatalytic reduction of bromate.
  • SMA supported on silica gel (SiO2) for Hosomi–Sakurai allylation of carbonyl compounds.
  • SMA supported on mesoporous SiO2 hollow spheres for Friedel–Crafts alkylation reaction.

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

12 - Non Combustible Liquids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Preparation of hollow mesoporous silica spheres with immobilized silicomolybdic acid and their catalytic activity for the hydrolytic dehydrogenation of ammonia borane
Umegaki T, et al.
Microporous and Mesoporous Materials : The Official Journal of the International Zeolite Association, 223, 152-156 (2016)

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