Coal tar hair dyes posing a risk of cancer.
21 C.F.R. § 740.18
in effectEffective: 2024-07-01(a) The principal display panel of the label and any labeling accompanying a coal tar hair dye containing any ingredient listed in paragraph (b) of this section shall bear, in accordance with the requirements of § 740.2, the following:
(b) Hair dyes containing any of the following ingredients shall comply with the requirements of this section: (1) 4-methoxy-m-phenylenediamine (2,4-diaminoanisole) and (2) 4-methoxy-m-phenylenediamine sulfate (2,4-diaminoanisole sulfate).
Warning—Contains an ingredient that can penetrate your skin and has been determined to cause cancer in laboratory animals.
Source: eCFRURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-21.xmlFetched: 7/26/2026
