反应详情

To 15 ml of 60% fuming sulfuric acid, while being cooled in ice, was added slowly 10.0 g of 4-amidinophenol hydrochloride. After the addition, the mixture was stirred at room temperature for 4 hours, then poured slowly into 200 ml of ice water, and stirred for a while. The colorless solid which was precipitated was collected by filtration, washed with water, then with acetone, and dried to obtain 10.2 g of 5-amidino-2-hydroxybenzenesulfonic acid.

1. additionAfter the addition
2. stirringstirred for a while
3. customThe colorless solid which was precipitated
4. filtrationwas collected by filtration
5. washwashed with water
6. dry with materialwith acetone, and dried