o-Sulfobenzaldehyde, 2-Sulfobenzaldehyde, o-Benzaldehydesulfonic acid, 2-Sulfonic acid benzaldehyde, benzaldehyde-2-sulphonic acid, o-formyl benzenesulfonic acid, Benzenesulfonic acid,2-formyl, ortho-formyl benzene sulfonic acid, UNII-L6N0M32U65, 2-sulphobenzaldehyde