Critical assessment of the pH of children's soap

Objective: To evaluate the pH value of children's antibacterial soaps and syndets used in children's baths and verify whether there is information regarding pH on the product label. Methods: Quantitative, cross‐sectional, analytical observational study that included ninety soap samples, both in bar and liquid presentations, as follows: 67 children's soap (group 1), 17 antibacterial soaps (group 2), and six syndets (group 3). Each sample had its pH measured after 1% dilution. In addition to descriptive statistics, the Pearson‐Yates chi‐squared test and Student's t‐tests were applied, considering the minimal significance level of 5%. The Wilcoxon‐Mann‐Whitney test, Fisher's exact test, and the Kruskal‐Wallis test were used for inferential statistics. Results: The pH levels varied considerably between liquid and bar presentations, with lower levels (4.4 to 7.9) found for the liquids (p