Periódico Tchê Química (Per. Tchê Quim.) is an international, Platinum Open Access (no APCs), double-blind peer-reviewed journal publishing three issues annually (quarterly frequency) in chemistry, chemical engineering, and related fields. Established in 2004, it is published by Araucária – Scientific Association, Brazil. ISSN: 1806-0374 (Print); 2179-0302 (Online). DOI: 10.52571/PTQ. Articles are published in English and Portuguese, with titles, abstracts, and keywords optionally in a third language. All content is freely accessible and preserved long-term, with no submission or publication fees.