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CAS 32638-88-3

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Pyrogallol red

Description:
Pyrogallol red, with the CAS number 32638-88-3, is a synthetic organic compound commonly used as a pH indicator in various chemical applications. It exhibits a distinct color change in response to pH variations, transitioning from red in acidic conditions to yellow in alkaline environments, making it useful for titrations and other analytical procedures. The compound is characterized by its ability to form stable complexes with metal ions, which can enhance its utility in biochemical assays. Pyrogallol red is soluble in water and exhibits good stability under normal laboratory conditions. Additionally, it has applications in histology and microbiology for staining purposes. However, it is important to handle this compound with care, as it may pose health risks if ingested or inhaled, and appropriate safety measures should be taken during its use. Overall, pyrogallol red is a versatile reagent in both academic and industrial settings, valued for its sensitivity and reliability in pH measurement and analysis.
Formula:C19H12O8S
InChI:InChI=1/C9H12N2O.C6H6O3/c1-11(2)9(12)10-8-6-4-3-5-7-8;7-4-2-1-3-5(8)6(4)9/h3-7H,1-2H3,(H,10,12);1-3,7-9H
InChI key:InChIKey=KUQNCHZOCSYKOR-UHFFFAOYSA-N
SMILES:O=S1(=O)OC2(C=3C1=CC=CC3)C=4C(OC=5C2=CC=C(O)C5O)=C(O)C(O)=CC4
Synonyms:
  • 2-(4,5,6-trihydroxy-3-oxo-3H-xanthen-9-yl)benzenesulfonate
  • 2-(4,5,6-trihydroxy-3-oxo-3H-xanthen-9-yl)benzenesulfonic acid
  • 3′,4′,5′,6′-Tetrahydroxyspiro[benzo[c][1,2]oxathiole-3,9′-xanthene] 1,1-dioxide
  • Benzenesulfonic acid, 2-(4,5,6-trihydroxy-3-oxo-3H-xanthen-9-yl)-
  • Pyrogallol red
  • Pyrogallolsulfonephthalein
  • Red pyrogallol
  • Spiro(3H-2,1-benzoxathiole-3,9'-(9H)xanthene)-3',4',5',6'-tetrol, 1,1-dioxide
  • Spiro[2,1-Benzoxathiole-3,9'-Xanthene]-3',4',5',6'-Tetrol 1,1-Dioxide
  • Spiro[3H-2,1-benzoxathiole-3,9′-[9H]xanthene]-3′,4′,5′,6′-tetrol, 1,1-dioxide
  • See more synonyms
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