Benzamide is an white solid with the chemical formula of C6H5C(O)NH2. It is the simplest amide derivative of benzoic acid. It is slightly soluble in water, and soluble in many organic solvents. A number of substituted benzamides exist. Benzamide is an white solid with the chemical formula of C6H5C(O)NH2. It is the simplest amide derivative of benzoic acid. It is slightly soluble in water, and soluble in many organic solvents. A number of substituted benzamides exist.