Abstract A study of the key sulfur odor components of guava was undertaken by headspace and solvent extraction techniques. GC and GC/MS analysis identified five sulfur components; dimethyl disulfide, dimethyl trisulfide, benzothiazole, 3-mercaptohexanol and 3-mercaptohexyl acetate. Two of these compounds have not previously been reported as occurring in guava (3-mercapto- hexanol and 3-mercaptohexyl acetate). These compounds have a cassis-like odor and are thought to make an important contribution to the odor of guava.