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Substance Name: Phosphotungstic acid
RN: 12067-99-1


  • Tungsten hydroxide oxide phosphate. A white or slightly yellowish-green, slightly efflorescent crystal or crystalline powder. It is used as a reagent for alkaloids and many other nitrogen bases, for phenols, albumin, peptone, amino acids, uric acid, urea, blood, and carbohydrates. (From Merck Index, 11th ed)

Molecular Formula

  • Unspecified
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Names and Synonyms

Name of Substance

  • Phosphotungstic acid

MeSH Heading

  • Phosphotungstic acid


  • EINECS 235-087-6

Systematic Names

  • Phosphotungstic acid
  • Tungsten hydroxide oxide phosphate
  • Tungstophosphoric acid (8CI)

Registry Numbers

CAS Registry Number

  • 12067-99-1

Other Registry Number

  • 60674-91-1

System Generated Number

  • 0012067991


Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD50 oral 3300mg/kg (3300mg/kg)   Toxicology and Applied Pharmacology. Vol. 42, Pg. 417, 1977.