The pH of lye and no-lye hair relaxers, including those advertised for children, is at levels that are corrosive to the skin

Background. Hair relaxers are used by up to 70% of females of black African ancestry. Occupational safety regulations list a pH ≥10.5 as irritant and a pH ≥11.50 as corrosive to the skin. Objectives. To determine the pH of all relaxers sold on the South African market and whether it is lower in no-l...

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