Properties and Stability of Sulfamic Acid
1. In a dry environment at room temperature, sulfamic acid is relatively stable, as long as it is kept out of contact with water, the solid does not absorb moisture. It decomposes at high temperature and emits toxic gases such as nitrogen and sulfur oxides. Sulfamic acid and its salts and various metal compounds can generate soluble salts. Decomposes at 260°C. Soluble in water, liquid ammonia, slightly soluble in methanol, insoluble in ethanol, ether organic solvent and carbon disulfide, liquid sulfurous acid. Aqueous solutions are highly ionized species. strong acid. The reactivity to organic matter is weak, and its salts are easily soluble in water (except for alkaline mercury salts). When its aqueous solution is boiled, it is hydrolyzed to ammonium sulfate. poisonous! It is neither volatile nor hygroscopic and stable at room temperature. Soluble in water, the aqueous solution is acidic. Hydrolysis in boiling water produces NH+4 and HSO-4.
2. Sulfamic acid does not absorb moisture in the air and can be stored for a long time at room temperature and in a dry environment. The chemical properties are stable, and its aqueous solution has strong acidity, which has a corrosive effect on metals.
3. Solubility: soluble in water, liquid ammonia, slightly soluble in ethanol and methanol, slightly soluble in acetone, insoluble in ether. Insoluble in organic solvents. Soluble in nitrogen-containing lye and liquid nitrogen; also soluble in nitrogen-containing organic reagents such as pyridine; insoluble in ethanol and methanol. It is moderately soluble in water and difficult to mix with common non-polar solvents such as THF or toluene.
4. Stability: stable
5. Incompatible substances: strong oxidants, strong bases
6. Conditions to avoid: heat
7. Hazard of polymerization: no polymerization
8. Decomposition products: sulfur oxides, nitrogen oxides