Sodium carbonate CAS# 50-01-1

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• Chemical Name:  Sodium carbonate
• CAS No.:     497-19-8
• Molecular Fomula: ： CH2O3.2Na
• Molecular weight：105.99
• Appearance: white Solid
• Sample：Available

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Description of SODA ASH 99% MIN

• Sodium carbonate (also known as washing soda, soda ash and soda crystals), Na2CO3, is the water-soluble sodium salt of carbonic acid.
  It most commonly occurs as a crystalline heptahydrate, which readily effloresces to form a white powder, the monohydrate. Pure sodium carbonate is a white, odorless powder that is hygroscopic (absorbs moisture from the air). It has a strongly alkaline taste, and forms a moderately basic solution in water. Sodium carbonate is well known domestically for its everyday use as a water softener. It can be extracted from the ashes of many plants growing in sodium-rich soils, such as vegetation from the Middle East, kelp from Scotland and seaweed from Spain. Because the ashes of these sodium-rich plants were noticeably different from ashes of timber (used to create potash), they became known as “soda ash”. It is synthetically produced in large quantities from salt (sodium chloride) and limestone by a method known as the Solvay process.
  The manufacture of glass is one of the most important uses of sodium carbonate. Sodium carbonate acts as a flux for silica, lowering the melting point of the mixture to something achievable without special materials. This “soda glass” is mildly water-soluble, so some calcium carbonate is added to the melt mixture to make the glass produced insoluble. This type of glass is known as soda lime glass: “soda” for the sodium carbonate and “lime” for the calcium carbonate. Soda lime glass has been the most common form of glass for centuries.
  Sodium carbonate is also used as a relatively strong base in various settings. For example, it is used as a pH regulator to maintain stable alkaline conditions necessary for the action of the majority of photographic film developing agents. It acts as an alkali because when dissolved in water, it dissociates into the weak acid: carbonic acid and the strong alkali: sodium hydroxide. This gives sodium carbonate in solution the ability to attack metals such as aluminium with the release of hydrogen gas.
  It is a common additive in swimming pools used to neutralize the corrosive effects of chlorine and raise the pH.
  In cooking, it is sometimes used in place of sodium hydroxide for lyeing, especially with German pretzels and lye rolls. These dishes are treated with a solution of an alkaline substance to change the pH of the surface of the food and improve browning.
  In taxidermy, sodium carbonate added to boiling water will remove flesh from the skull or bones of trophies to create the “European skull mount” or for educational display in biological and historical studies.
  In chemistry, it is often used as an electrolyte. Electrolytes are usually salt-based, and sodium carbonate acts as a very good conductor in the process of electrolysis. In addition, unlike chloride ions, which form chlorine gas, carbonate ions are not corrosive to the anodes. It is also used as a primary standard for acid-base titrations because it is solid and air-stable, making it easy to weigh accurately.

Basic Info of SODA ASH 99% MIN

Basic Info
Numbering system
Properties
Safety Info
Basic Info

Numbering system

Properties

Safety Info

What is Sodium carbonate?

• With the progress of science and technology and the development of society, chemical products have invariably permeated our daily lives, in medicine, food, cosmetics, electronics, industry, and other areas, becoming an essential part of our lives. One such product is Sodium carbonate   which has developed particularly rapidly in recent years. Do you know about Sodium carbonate  ?
• The official answer：Sodium carbonate, chemical formula Na2CO3, commonly known as soda ash, soda ash, washing soda, white powder in general, is a strong electrolyte. Density is 2.532g/cm3, melting point is 851°C, easily soluble in water, with the generality of salt, is a weak acid salt, slightly soluble in anhydrous ethanol, insoluble in propanol, hydrolysis reaction occurs after dissolving in water, making the solution alkaline, has a certain degree of corrosiveness, can be neutralized with acid to produce the corresponding salt and emit carbon dioxide. It can be decomposed under high temperatures to produce sodium oxide and carbon dioxide. Long-term exposure to air can absorb moisture and carbon dioxide in the air, generating sodium bicarbonate and hard lumps. It is very hygroscopic and can easily form hard lumps, and does not decompose at high temperatures. Sodium carbonate and water generate Na2CO3-10H2O, Na2CO3-7H2O, Na2CO3-H2O three kinds of hydrate, of which Na2CO3-10H2O is the most stable, and the heat of dissolution of dissolved in water is very small. Na2CO3-10H2O, also known as crystal soda, is easy to weather in dry air and used to be used in household washing and wool washing, so it is also called “washing soda”. In the past, our folk used to use both laundry and flour “block soda”, which is made by mixing soda ash with a lot of water (plus some baking soda (NaHCO3), and its water content is more than 50%. Na2CO3-7H2O is unstable and can only be precipitated from saturated sodium carbonate solution at 32.5~36℃. Sodium carbonate is a weak acid and strong base salt (soda ash is a salt, not a base, only the solution shows strong alkalinity). Chemically produced Na2CO3 is purer than natural alkali, so people call it “soda ash”.

What’s the application of Sodium carbonate?

• In production life, sodium carbonate is used to make the pastry, to make sodium hydroxide, etc., or as a formula for a variety of detergents. Water purification uses it as a softening agent. Among the industrial soda ash, it is mainly used in light industry, building materials, and chemical industry, accounting for about 2/3; followed by metallurgy, textile, petroleum, national defense, medicine, and other industries. The glass industry is the largest consumer of soda ash, consuming 0.2 tons of soda ash per ton of glass. The chemical industry is used to make water glass, sodium dichromate, sodium nitrate, sodium fluoride, baking soda, borax, trisodium phosphate, etc. The metallurgical industry used as a smelting flux, flotation agent for ore dressing, steel making, and antimony making as desulfurization agents. The printing and dyeing industry is used as a water softener. The tanning industry is used for degreasing raw hides, neutralizing chrome tanned leather, and improving the alkalinity of chrome tanning solution. It is also used in the production of synthetic detergent additives such as sodium tripolyphosphate and other sodium phosphate salts. Food grade soda ash is used for the production of monosodium glutamate, pasta, mainly used in float glass, picture tube glass shell, optical glass, etc. It can also be used in other sectors such as the chemical industry and metallurgy. The use of heavy soda ash can reduce alkali dust flying, reduce raw material consumption, improve labor conditions, but also improve product quality, while reducing the erosion of alkali powder on refractory materials, prolonging the service life of the furnace, basic chemical materials, widely used in medicine, paper, metallurgy, glass, textiles, dyestuff, and other industries, used as a fermenting agent in the food industry.

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