... used in textile industry for vat dyeing , reduction cleaning, printing and stripping , textile bleaching . 2, it is used in bleaching ... , it is used in mineral, the compound of thiourea and other sulphides 5 it is used as reducing agent in ... grade is used in foodstuffs, as bleaching agent andpreservative in dried fruits , dried vegetable ,vermicelli, glucose, sugar, rock sugar, caramel ,candy liquid ...