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Order early for pre-holiday delivery. Flinn will be closed December 24th, 2025,
through January 4th, 2026, reopening Monday, January 5th, 2026.
Orders received after 10:30 AM Central Time on Tuesday, December 23rd, 2025,
will ship after we return.
Price: $10.54
In Stock.
C20H14O4
F.W. 318.31
Hazard Alert
Possible carcinogen. Phenolphthalein is listed as a suspected reproductive toxin by the state of CA (Proposition 65). Possible reproductive/fertility hazard.
WARNING: This product can expose you to chemicals, including Phenolphthalein, which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
This item can only be shipped to schools, museums and science centers
1-800-452-1261
Phenolphthalein