1. White orthorhombic crystal.

2. Nonvolatile, nonhygroscopic, odorless.

3. High stability at normal temperature.

4. Freely soluble in water and liquid ammonia, strongly acidic in water solution.

5. Slightly soluble in methanol, insoluble in ethanol and ether.

6. Characteristics of amino and sulfonic functional groups, may go on chemical reaction with many matters.