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79690 Sigma-Aldrich

Phosphotungstic acid hydrate

for microscopy

Synonym: Tungstophosphoric acid

  • CAS Number 12501-23-4

  • Linear Formula H3[P(W3O10)4] · xH2O

  • Molecular Weight 2880.05 (anhydrous basis)

  •  MDL number MFCD00149915

  •  PubChem Substance ID 329768557

  •  NACRES MA.02

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Properties

Related Categories Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, Derivatization Reagents, Derivatization Reagents TLC,
Quality Level   200
grade   for microscopy
form   powder or crystals
application(s)   hematology: suitable
  histology: suitable
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 (SO42-): ≤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
Featured Industry   Diagnostic Assay Manufacturing
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 reagent suitable to detect alkaloids and nitrogenous bases. It is suitable in manufacturing organic pigments, additive in plating industry. It imparts 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

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
RIDADR 
UN 3260 8 / PGII
WGK Germany 
WGK 3
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Protocols & Articles
Peer-Reviewed Papers
15

References

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