National Toxicology Program

National Toxicology Program
https://ntp.niehs.nih.gov/go/19683

Scientific Review of Phenolpthalein

CASRN 77-09-8
Status: Listed in the Report on Carcinogens (RoC)

Primary Uses or Exposures: Phenolphthalein in 1% alcoholic solution is used as a visual indicator in titrations of mineral and organic acids and most alkalies. It has also been used as an over-the-counter laxative.

Background Document

Public Comments

Meetings

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