Cyclamates are white, odorless, soluble crystalline salts, sodium cyclamate (C₆H₁₁NHSO₃Na) or calcium cyclamate ([C₆H₁₁NHSO₃]₂Ca.2H₂O). These are salts of N-cyclohexylsulfamic acid (C₆H₁₁NHSO₃H). They have about 30 times the sweetening power of ordinary sugar (sucrose). They were widely used as potent sweetening agents until they were found to cause cancer in rats. They were banned in the United States in 1969.