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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Description of key information

The test substance was tested for carcinogenicity by oral administration in two experiments in mice and in one experiment in rats [1]. In one experiment in mice, it induced histiocytic sarcomas and lymphomas in both males and females and benign ovarian tumours in females. In an experiment in mice lacking one allele of the p53 tumour suppressor gene, it increased the incidence of lymphomas. This result was confirmed in a separate study reported as an abstract. It induced benign renal tumours in male rats and benign phaeochromocytomas in males and females [2, 3].



1. National Toxicology Program (NTP), Toxicology and Carcinogenesis Studies of Phenolphthalein (CAS no. 77-09-8) in F344/N Rats and B6C3F1 Mice (Feed Studies) - Technical Report 465, 1996.

2. Tice, R.R., et al., Measurement of micronucleated erythrocytes and DNA damage during chronic ingestion of phenolphthalein in transgenic female mice heterozygous for the p53 gene. Environmental & Molecular Mutagenesis, 1998. 31(2): p. 113-24.

3. Dunnick, J.K., et al., Phenolphthalein induces thymic lymphomas accompanied by loss of the p53 wild type allele in heterozygous p53-deficient (+/-) mice. Toxicologic Pathology, 1997. 25(6): p. 533-40.

Key value for chemical safety assessment

Justification for classification or non-classification

Classification, Labeling, and Packaging Regulation (EC) No. 1272/2008

The substance is harmonized classified for carcinogenicity Cat.1B (H350) according to Annex VI of Regulation (EC) No 1272/2008 (CLP Regulation).

Additional information