Sulfacetamide sodium salt hydrate

Sulfacetamide sodium salt hydrate (CAS No.: 6209-17-2) is a sulfonamide-class small molecule widely utilized in biomedical research as an antibacterial and antifungal agent, primarily functioning through competitive inhibition of bacterial dihydropteroate synthase, a key enzyme in the folate biosynthesis pathway, thereby disrupting microbial nucleotide synthesis and metabolic processes. This compound exhibits inhibitory activity against a range of microorganisms associated with dermatological and ocular research models, including pathogens relevant to conditions such as pityriasis versicolor and inflammatory skin-associated microbial communities, with reported activity typically observed in the nanomolar to micromolar range depending on organism and assay conditions. In experimental settings, sulfacetamide sodium salt hydrate is frequently applied in in vitro microbial susceptibility assays, cell-based infection models, and exploratory pharmacology studies aimed at characterizing antimicrobial mechanisms or screening compound libraries for anti-infective activity. It is also used to investigate host–microbe interactions and the modulation of microbial growth in tissue-relevant models. The concentrations or dosing regimens employed vary according to experimental design, cell type, and target organism, making it a versatile tool compound for studies focused on folate pathway inhibition, antimicrobial resistance mechanisms, and drug discovery efforts targeting bacterial metabolism.