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Sulfamic acid

Update time:2021/11/02 09:01:11     View:  
The molecular formula of sulfamic acid is NH2SO3H. The commercially available product is a white powder. As long as it is kept dry and not in contact with water at room temperature, the solid sulfamic acid does not absorb moisture and is relatively stable. The aqueous solution of sulfamic acid has the same strong acidity as hydrochloric acid and sulfuric acid, so it is also called solid sulfuric acid. It has the characteristics of non-volatile, odorless and minimal toxicity to the human body. Dust or solution is irritating to eyes and skin and can cause burns. The maximum allowable concentration is 10mg/m 3. Rinse with water when the eyes are irritated, and seek medical treatment for severe cases. Wash with water when in contact with the skin, and then wash thoroughly with soap. At the entrance, you should rinse your mouth immediately and rush to the hospital for treatment. Packed in wooden boxes lined with polyethylene plastic bags, each box has a net weight of 25kg. Store in a cool, ventilated and dry place. The packaging should be sealed to prevent moisture. Protect from rain and sunlight during transportation. Wear gas masks and gloves when disposing of escaping materials, sweep them up with sand and soil or rinse them with water. In case of fire, water, sand and fire extinguishers can be used to put out the fire.
Nature and stability
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 solvents, carbon disulfide, and liquid sulfurous acid. The aqueous solution is highly ionized. strong acid. The reactivity to organic matter is weak, and its salts are easily soluble in water (except alkaline mercury salts). When its aqueous solution is boiled, it is hydrolyzed to ammonium sulfate. poisonous! It is not volatile nor hygroscopic, and is very stable at room temperature. It is soluble in water, and the aqueous solution is acidic. Hydrolysis in boiling water generates 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 is corrosive to metals.
3. Solubility: soluble in water and liquid ammonia, slightly soluble in ethanol and methanol, slightly soluble in acetone and insoluble in ether. Insoluble in organic solvents. Easily soluble in nitrogen-containing lye and liquid nitrogen; also soluble in nitrogen-containing organic reagents such as pyridine; hardly soluble 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 materials: strong oxidants, strong alkalis
6. Conditions to avoid contact: Heat
7. Polymerization hazard: no polymerization
8. Decomposition products: sulfur oxides, nitrogen oxides
Chemical properties
Colorless orthorhombic crystals or white crystals. Odorless. Soluble in water, liquid ammonia, slightly soluble in methanol, insoluble in ethanol, ether organic solvents, carbon disulfide, and liquid sulfurous acid. The aqueous solution is highly ionized. strong acid. The reactivity to organic matter is weak, and its salts are easily soluble in water (except alkaline mercury salts). When its aqueous solution is boiled, it is hydrolyzed to ammonium sulfate.
Regulation information
It is an acid corrosive product in hazardous chemicals.
Precautions for storage and transportation
Store in a sealed and dry place. Airtightly package and store in a dry and ventilated place. It is stored and transported in equal parts with oxidants and alkalis. Pay attention to personal protection, and direct physical contact is strictly prohibited. If swallowed, rinse your mouth with water, drink milk or egg white.
Transportation considerations
During railway transportation, the dangerous goods shall be installed strictly in accordance with the dangerous goods distribution table in the "Rules for the Transport of Dangerous Goods" of the Ministry of Railways. The packaging should be complete at the time of shipment, and the loading should be secure. During transportation, ensure that the container does not leak, collapse, fall, or be damaged. Mixed shipment and transportation with oxidants, alkalis, edible chemicals, etc. are strictly prohibited. Transport vehicles should be equipped with leakage emergency treatment equipment during transportation. Avoid exposure to the sun, rain, and high temperature during transportation.
Chemical properties
Aminosulfonic acid is an important fine chemical product, which is widely used in various industrial equipment and civil cleaning agents for the manufacture of metals and ceramics, petroleum blending agents and cleaning agents, electroplating industrial agents, electrochemical polishing agents, asphalt emulsifiers, and etching agents. Various fields such as sulfonating agents for dyes, medicines and pigment industries, dyeing agents, high-efficiency bleaching agents, fiber, paper flame retardants, softeners, resin crosslinking accelerators, herbicides, anti-blooming agents, and standard analytical reagents middle.
Sulfamic acid can be made into extremely pure crystals that are stable at room temperature. Its aqueous solution has the same strong acidity as hydrochloric acid and sulfuric acid, and is also known as solid sulfuric acid. It is non-volatile, non-hygroscopic, and has minimal toxicity to humans, but the skin should not be in contact with sulfamic acid for a long time, let alone enter the eyes. The production process of sulfamic acid is simple, the reaction is relatively easy to control, the raw materials and equipment are relatively easy to solve, the waste water is also easy to treat, and the by-products can be effectively used. The product can replace sulfuric acid, and its packaging, storage and transportation are very convenient.
Use
Aminosulfonic acid is used as a cleaning agent, because it is a solid, has many advantages such as convenient storage, transportation, and easy preparation, and is especially suitable for long-distance use.
Sulfamic acid cleaning agent has a wide range of applications, and can be used to clean boilers, condensers, heat exchangers, jackets and chemical pipelines. It is used in breweries to remove glass-lined storage tanks, pots, open beer coolers, and scales on beer barrels; to clean evaporators in enamel factories, and equipment in paper mills; in air conditioning, cooling systems and evaporative condensers can be removed Rust and scale; it can be used by sea ships to remove seaweed and scale in seawater evaporators (distillation equipment), heat exchangers and salt water heaters; it can clean copper pots, radiators, tableware washing mechanisms, silverware, toilets, tiles, The scale of food and milk processing equipment; it can remove the protein deposited on the cooker and the deposits on the disinfection used in the processing plants of fresh meat, vegetables and cheese. The U.S. Department of Agriculture has approved the use of sulfamic acid as an acid cleaning agent in fresh meat, poultry, rabbit, and egg processing enterprises.
Overview of dangers
Toxicity protection: The product is low in toxicity. It has a certain stimulating effect on the skin and eyes. Production equipment should be airtight, and operators should wear protective gear
Safety: Dust or solution is irritating to eyes and skin and can cause burns. The maximum allowable concentration is 10mg/m3. Rinse with water when the eyes are irritated, and seek medical treatment for severe cases. Wash with water when in contact with the skin, and then wash thoroughly with soap. At the entrance, you should rinse your mouth immediately and send it to the hospital for treatment. Packed in wooden boxes lined with polyethylene plastic bags, each box has a net weight of 25kg. Store in a cool, ventilated and dry place. The packaging should be sealed to prevent moisture. Protect from rain and sunlight during transportation. Wear gas masks and gloves when disposing of escaping materials, sweep them up with sand and soil or rinse them with water. In case of fire, water, sand and fire extinguishers can be used to put out the fire.
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