2-Thiouracil (CAS 141-90-2) is a sulfur-containing derivative of uracil that functions as an inhibitor of thyroid hormone synthesis It exerts its antihyperthyroid effects by interfering with the enzymatic iodination of tyrosine residues within thyroglobulin thereby suppressing the production of triiodothyronine (T3) and thyroxine (T4) Due to its capacity to modulate thyroid function 2-Thiouracil is utilized in biomedical research to study thyroid hormone regulation and associated disorders as well as to model hypothyroid states in experimental settings