In the end, the total sample consisted of 419 households distributed over 27 ARs of the Federal District. It was assumed that the variances were constant and maximum at the strata, with a confidence level of 95% and a margin of error of 5%. These regions were grouped into I, II, and III according to the per capita income in each region. Included in Region I were the regions where the per capita income was higher than R$ 1,000; ABT-888 chemical structure in Region II, those in which the income ranged from R$ 500 to R$ 1,000, and in Region III, those in which the income was less than R$ 500.

In each selected household, one of the residents aged 18 years or older, present at the interview, answered questions from a pre-prepared questionnaire on the use of household sanitizing products after doubts were clarified and the informed consent was signed. The questionnaire included questions on: 1) the family sociodemographic conditions, such as number of individuals living

in the household, age, and educational level of the respondent and other family members; selleck 2) the form of storage (room and place) of cleaning products; 3) risk practices, defined as making soap

at home, mixing cleaning products, disposal of packaging, reuse of the original Aurora Kinase packaging, and having lye and/or illicit products at home; 4) knowledge of the interviewee about the health risks of sanitizing products, and the habit of reading and following the directions printed on the labels. For the assessment of household income, the Brazilian criterion of economic classification (2008) was used. This criterion divides the population into the economic classes A1, A2, B1, B2, C1, C2, D, and E. In this study, the classes A1 and A2 were grouped as A, B1 and B2 classes as B, C1 and C2 classes as C, and classes D and E as D/E. The sanitizing products were classified according to the risk, using the criteria established by ANVISA, which classifies products as risk 1 and risk 2. Risk 1 products are those that offer less risk, have a 2 < pH < 11.5 and no corrosive characteristics, antimicrobial activity, insecticide action, are not based on viable microorganisms, and do not contain in their formulation inorganic acids such as hydrofluoric (HF), nitric (HNO3), sulfuric acid (H2SO4), or their salts. All other products are classified as risk 2.