Sulfamic acid, white rhombic crystal. Non-volatile, non-hygroscopic, density 2.126, melting point 205 ℃ (decomposition starts). Soluble in water , slightly soluble or insoluble in organic solvents. In aqueous solution can be ionized, was moderately acidic. Most salts are soluble in water. Normal temperature stability. Decomposition at high temperatures. Sulfamic acid chemical information:
CAS NO: 5329-14-6
EINECS NO: 226-218-8
Molecular Formula: H3NO3S
Molecualr Weight: 97.09
Sulfamic acid aqueous solution has the same strongly acidic with hydrochloric acid, sulfuric acid, etc., so called known solid acid, having a non-volatile, non-toxic to humans and minimal odor characteristics. Sulfamic acid aqueous solution of iron corrosion products slower effect can add some sodium chloride, hydrochloric acid produced so slowly, thereby effectively dissolving the iron deposit. Sulfamic acid aqueous solution can remove scale and corrosion products of iron, steel, copper, stainless steel and other materials equipment surfaces. In addition, it is the only used as a galvanized metal surface cleaning acid. When cleaning using the sulfamic acid solution, the temperature control in general not exceed 66 ℃ (to prevent decomposition of the amino acid) at a concentration of not more than 10%.
In addition ,sulfamic acid can be used as a production acesulfame, cyclamate sweeteners and other raw materials. When used for cleaning metal, salt of sulfamic acid and the majority of metal oxide is soluble in water, and less corrosive to metal amino acid other than a mineral acid. It is also used for boiler cleaning equipment, acidizing oil sludge pit, and also apply to the manufacture of forest herbicides. Flame retardant fabric timber manufacturing, timber, paper, cotton fiber is added a certain amount of sulfamic acid can improve the whiteness of the bleached and can improve the flexibility of the fibers. At the same time, sulfamic acid can also be used in the manufacture of pesticides, pharmaceutical intermediates.
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