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the claim
A brown color appears at the end point during titration with phenolphthalein indicator
the verdict
REFUTED
the evidence says no
refutedsupported
the weight of evidence
0 sources for · 4 against
AS REPORTEDno primary record reached; this is what the reporting says

Phenolphthalein turns pink (or fuchsia) in basic solutions and is colorless in acidic solutions, rather than turning brown at the end point of a titration.

Evidence against · 4
Wikipedia: Phenolphthalein
cited by 0
Reference article covering this claim directly
See more details
The analysis

Judged against the evidence record for claims of this kind.

More against · 3
Macmillan Pub. Co.: Experiments in general chemistry : a laboratory program to accompany Petrucci's General chemistry, sixth edition
1993 · cited by 0
States that the phenolphthalein end point is faintly pink, not brown.
Prentice Hall: Experiments in general chemistry
2002 · cited by 0
Indicates the phenolphthalein end point color is faintly pink.
Prentice Hall: Experiments in general chemistry
2002 · cited by 0
Confirms the phenolphthalein end point is faintly pink.
Everything we examined (31) — 23 independent sources
This check searched the claim as stated. It did not run a separate search for evidence against it.
  1. Wikipedia: Phenolphthaleinreferencesame source L1refutes
  2. Wikipedia: Titrationreferencesame source L1no side takennot shown: read and judged not to bear on this claim
  3. Macmillan Pub. Co.: Experiments in general chemistry : a laboratory program to accompany Petrucci's General chemistry, sixth editionreferencerefutes
  4. Prentice Hall: Experiments in general chemistryreferencesame source L3refutes
  5. Prentice Hall: Experiments in general chemistryreferencesame source L3refutes
  6. New York, McGraw-Hill: Quantitative pharmaceutical chemistryreferencesame source L4no side takennot shown: read and judged not to bear on this claim
  7. McGraw-Hill: Quantitative pharmaceutical chemistryreferencesame source L5no side takennot shown: read and judged not to bear on this claim
  8. New York, Blakiston Division: Quantitative pharmaceutical chemistryreferencesame source L4no side takennot shown: read and judged not to bear on this claim
  9. McGraw Hill Book Company: Quantitative Pharmaceutical Chemistryreferencesame source L5no side takennot shown: read and judged not to bear on this claim
  10. Princeton, N.J., Van Nostrand: Elements of quantitative analysis; theory and practicereferenceno side takennot shown: read and judged not to bear on this claim
  11. OpenAIRE: Modelling the Radiometric Color of Inland Waters: Implications to a) Remote Sensing and b) Limnological Color Scalespeer-reviewedno side takennot shown: read and judged not to bear on this claim
  12. OpenAIRE: Tetraphlebia eleates Weymer 1890peer-reviewedno side takennot shown: read and judged not to bear on this claim
  13. OpenAIRE: Stuardosatyrus williamsianus Butler 1868peer-reviewedno side takennot shown: read and judged not to bear on this claim
  14. OpenAIRE: Euselasia pontasis Callaghan, Llorente-Bousquets & Luis-Martinez, 2007, sp. nov.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  15. OpenAIRE: Dismodix colai Supeleto & Aguiar 2024, sp. nov.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  16. OpenAIRE: Sphaerodactylus poindexteri Mccranie & Hedges, 2013, sp. nov.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  17. Astrophys.J.Suppl.: Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Resultspeer-reviewedno side takennot shown: read and judged not to bear on this claim
  18. Astron.Astrophys.: The eROSITA X-ray telescope on SRGpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  19. Living Rev.Rel.: Cosmology with the Laser Interferometer Space Antennapeer-reviewedno side takennot shown: read and judged not to bear on this claim
  20. Astrophys.J.Suppl.: Structure and Formation of Elliptical and Spheroidal Galaxiespeer-reviewedno side takennot shown: read and judged not to bear on this claim
  21. J.Phys.G: The Forward Physics Facility at the High-Luminosity LHCpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  22. NASA Technical Reports Server: The color of the surface of Venusprimary-datasame source L18no side takennot shown: read and judged not to bear on this claim
  23. NASA Technical Reports Server: Observations of Mare Serenitatis from lunar orbit and their interpretationprimary-datasame source L18no side takennot shown: read and judged not to bear on this claim
  24. NASA Technical Reports Server: A Multidisciplinary Investigation of the Origins of Pluto’s Dark Surface Materialsprimary-datasame source L18no side takennot shown: read and judged not to bear on this claim
  25. NASA Technical Reports Server: Observations of Mare Serenitatis from lunar orbit and their interpretationprimary-datasame source L18no side takennot shown: read and judged not to bear on this claim
  26. NASA Technical Reports Server: Io: Precise Comparison of Voyager Spectral Curves with Laboratory Measurementsprimary-datasame source L18no side takennot shown: read and judged not to bear on this claim
  27. OSTI: Toward the analytic bootstrap of energy correlatorspeer-reviewedno side takennot shown: read and judged not to bear on this claim
  28. OSTI: Innovative Interfacial Engineering for Simultaneous Enhancement in Efficiency, Stability, and Reliability in Perovskite Devicespeer-reviewedno side takennot shown: read and judged not to bear on this claim
  29. OSTI: Deflagration to Detonation Transition Update: XTIV (eXplosive Thermal Ignition to Violence)peer-reviewedno side takennot shown: read and judged not to bear on this claim
  30. npj artificial intelligence: A variational framework for residual-based adaptivity in neural PDE solvers and operator learningpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  31. Research in the Mathematical Sciences: A sweeping positivity-preserving high-order finite difference WENO scheme for Euler equationspeer-reviewedno side takennot shown: read and judged not to bear on this claim
The paper trail · every fact has a biography
first checked06 Aug 2026
judged → REFUTED · 006 Aug 2026
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