Caution required when maintaining vent piping due to potential presence of phenol. A single prolonged skin exposure is not likely to result in absorption of harmful amounts. The dermal LD50 has not been determined. Single dose oral toxicity is low. Ingestion of large amounts may cause headache, vomiting, and diarrhea.
Available data is inadequate to evaluate carcinogenicity.
No data on components other than biphenyl, which did not produce birth defects in laboratory animals, however, at excessive doses, did cause other toxic effects on the mother and fetus. Results of mutagenicity tests on biphenyl in animals have been negative. Wash off in flowing water or shower. Wash contaminated clothing before reuse. No specific antidote.