Grape is one of the most commercial horticultural crops of the world. Grapes are very nutritious, rich source of minerals and different vitamins. It revels from the figure, the Thompson seedless raisins treated with Changes in the hydroxyl ion scavenging potential in the Thompson and Sonaka seedless raisins treated with different chemical compounds on the basis of percent inhibition are presented are shown in Figure. It revels from the figure, that the Thompson seedless raisins treated with K2CO3+sulphur has a greater hydroxyl ion scavenging potential than the raisins treated with other compounds, while Sonaka seedless raisins treated with CaCO3 shows higher OH- ions scavenging potential than the raisins treated with other compounds.