Sulfamic acid (other names: aminosulfonic acid, mdiosulfuric acid, sulfuric acid monoamide) is a substance that is colorless crystals of the rhombic form. The formula for this compound is: NH2SO2OH (or NH2SO3H)
Physical Properties of Amirasophonic Acid:
1. This substance exists in the form of colorless crystals, which have the shape of a diamond. The zonation is orthorhombic: b = 0.8025 nm, a = 0.8037 nm, z = 8, c = 0.9237 nm. As a zwitterion, it exists in a crystalline state.
2. Sulfamic acid has the following molecular weight: 97,098 AU. The melting point is 205 °C, the decomposition is 260 °C.
3. The solubility in 25° acetone is 0.04; in water at 20 degrees 17,57, at 40 degrees 22,77 and at 80 degrees – 32,01; 25 °C in diethyl alcohol, 0.01; 25° 0.18 in formamide; 25 degree 0.4 degree in methanol
4. It has a density of 2.126 grams per centimeter.
Chemical Properties of Sulfamic Acid:
1. When heated to 260 degrees, it decomposes into SO2 (sulfur oxide Le), SO 3 (sulfur oxide Al), N 2 (nitrogen) and H 2 O (water). This is what the reaction looks like:
NH2SO2OH = SO2 (oxide oxide L) + SO 3 (sulfur oxide L) + N 2 (nitrogen, released as gas) + H 2 O (water)
2. At room temperature, this substance is practically not subject to hydrolysis. But at high temperature it is hydrolyzed to NH4HSO4 and the reaction rate increases significantly in acidic environment.
3. Since various metals, oxides of their carbonates, hydroxides and aminosulfonic acid forms NH2SO3M salts (common names – sulfamates) with thionyl chloride SOCl2 – NH2SO2Cl sulfamoyl.
4. When interacting with HNO2 (nitrous acid) is subjected to oxidative deamination – NH2SO3H + HNO2N2O + N 2 + H2SO4 (sulfuric acid) (is released in the form of nitrogen gas). This reaction is used to determine the amount of sulfuric acid monoamide and decompose excess nitrous acid (HNO2) into the formation of azo dyes.
5. Sulfamic acid is oxidized by chlorine (Cl), bromine (Br), potassium permanganate (KMnO 4) and sulfuric acid (H 2 SO 4) and chlorates of nitrogen (N 2).
6. The reaction of this acid with HClO (hypochlorous acid) or NaClO (sodium hypochlorite) leads to the formation of N,N-dichloro- or N-chloro derivatives. Sodium in liquid ammonia (Na) (NH3) react with NaSO3NHNa, sodium sulfate (Na2SO4) 6HSO3NH2 5Na2SO4 15N2O.
7. Also sulfuric acid monoamide reacts with primary alcohols and secondary, phenols. Tertiary, secondary and primary amines occur with this acid aminosulfamates, and carboxylic-ammonium acids are the ideas of N acyl sulfamates.
8. For the identification of aminosulfonic acid, fusion with nitrous acid (HON 2) or benzoin (C 14 H 12 O 3) is used.
Use of Sulfuric Acid Monamide
1. Industrial chemistry: for cleaning tools from beer and milkstone from various mineral deposits (oxide films, hardness salts, iron compounds). In this case the production of hydrochloric acid becomes useless, as sulfamic acid is less corrosive.
2. In everyday life and in public catering enterprises: for the processing of kitchen and food utensils, as part of some detergents.
3. As a raw material for the preparation of some chemical compounds, for example, herbicides and fire retardant materials.
4. In electroplating: for etching food and manufacturing electrolytes.
5. To remove mucus from swimming pools (their water-cooling system)
6. When cleaning machines for paper making
7. When processing oil fine field
How should sulfamic acid be stored properly, and what precautions should be taken when using it?
The monoamide of sulfuric acid is classified as a flame-retardant substance. Upon exposure to a living organism, it refers to compounds of the third hazard class. Severe burns to skin and mucous membranes.
Keep this acid in a double polyethylenebag (capacity forty kilograms), specially designed for chemical products. It is worth considering that the product is easily soluble in H2O (water). is caked with long storage