Can't eat

Containing aluminum ammonium sulfate vermicelli can not be eaten, so as not to affect the health of aluminum intake. Ammonium aluminum sulfate can no longer be used in food processing and production; steamed bread, cakes and other flour products (except fried pasta products, batter, batter, wrapping powder, frying powder) can not be added to the aluminum-containing bulking agent (potassium aluminum sulfate and ammonium aluminum sulfate); puffed food is no longer permitted to use any aluminum-containing additives. Hazards of adding aluminum ammonium sulfate to food: oil sticks, noodles, puffed food and other foods in the processing may use aluminum-containing food additives, long-term consumption of human body is very harmful, especially for children's growth and development will be affected.

The National Health and Planning Commission and other departments from July 1, 2014, the pasta products can not be added to the aluminum-containing bulking agent aluminum potassium sulfate and aluminum ammonium sulfate, which is commonly known as "alum", the main ingredient in baking powder is also the above two substances.

Aluminum ammonium sulfate is an inorganic substance, is colorless, transparent crystals or white powder, which is slightly soluble in water, dilute acid and glycerol, the aqueous solution is acidic, insoluble in alcohol, often in the form of water containing 12 crystals, slightly sweet and astringent taste.

Aluminum ammonium sulfate main ingredient

Aluminum sulfate

White glossy crystals, granules or powder. Sweet odor. Stable in the air. 86.5 ℃ to lose part of the water of crystallization, 250 ℃ to lose all the water of crystallization. When heated, it expands violently and turns into spongy substance. When burned to red heat, it decomposes into sulfur trioxide and aluminum oxide. Weathered when the relative humidity is about 25% lower. Easily soluble in water, almost insoluble in ethanol, the solution is acidic. After boiling for a long time, there is insoluble alkali salt precipitation. Relative density 1.62. Aluminum sulfate is a widely used industrial reagent, often confused with alum (both potassium aluminum sulfate dodecahydrate).

Chemical properties

Extremely soluble in water, aluminum sulfate in pure sulfuric acid can not be dissolved (just **** exist), in sulfuric acid solution and sulfuric acid **** with the dissolution of water, so aluminum sulfate in sulfuric acid solubility is the aluminum sulfate solubility in water.

At room temperature precipitation contains 18 molecules of water of crystallization, for 18 water aluminum sulfate, industrial production of more than 18 water aluminum sulfate. Containing anhydrous aluminum sulfate 51.3%, even at 100 ℃ will not be autolytic (dissolved in its own water of crystallization).

Ammonium Sulfate

Pure product is colorless transparent rhombohedral crystal system crystals, aqueous solution is acidic. Insoluble in alcohol, acetone and ammonia. Hygroscopic, moisture absorption solidified into a block. Heated to 513 ℃ or more completely decomposed into ammonia, nitrogen, sulfur dioxide and water. Ammonia gas is released when it interacts with alkali. Reacts with barium chloride solution to produce barium sulfate precipitate. It can also cause salinization of proteins.

An excellent nitrogen fertilizer (commonly known as fertilizer powder), suitable for general soil and crops, can make branches and leaves grow vigorously, improve fruit quality and yield, enhance the crop's resistance to disasters, can be used as a base fertilizer, fertilizer and seed fertilizer, but the long-term use of may lead to soil crusting. It can be used as base fertilizer and seed fertilizer, but long-term use may lead to soil sloughing. It can be used to make ammonium chloride by complex decomposition reaction with table salt, generate ammonium alum with aluminum sulfate, and make refractory materials together with boric acid. It can be added to electroplating solution to increase electrical conductivity. It is also a catalyst for food coloring, a nitrogen source for cultivating yeast in the production of fresh yeast, a dyeing aid for acid dyes, and a leather de-ashing agent. In addition, it is also used in beer brewing, chemical reagents and storage battery production.

Another important role is the mining of rare earths, mining ammonium sulfate as raw material, the use of ion-exchange form of rare earth elements in the exchange out of the mineral soil, and then collect the leach solution simple filtering and separation of rare earths after drying into a rare earth ore, mining production of 1 ton of rare earth ore requires about 5 tons of ammonium sulfate.