1. Metal parts cleaning,getting away oxidize surface. 2.Slightly corrosive to metal, usedto flush boiler. Sulfamic Acid CharacteristicsWhite orthorhombic cystal. Nonvolatile, nonhygroscopic,smell-less. High stability at normal tenperature and can maintain original quality for several years. Freely soluble in water and liquid ammonia,strongly acidic in water solution. Slightly soluble in methanol, ...