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        Sodium carbonate

        Description Physical Properties Uses Toxicity Production method References
        Sodium carbonate
        Sodium carbonate structure
        CAS No.
        497-19-8
        Chemical Name:
        Sodium carbonate
        Synonyms
        ASH;Na-X;HYPO;Consal;'HYPO';Grb3-3;MST084;ODA ASH;MSTP084;Calcined
        CBNumber:
        CB9853672
        Molecular Formula:
        CNa2O3
        Formula Weight:
        105.99
        MOL File:
        497-19-8.mol

        Sodium carbonate Properties

        Melting point:
        851 °C(lit.)
        Boiling point:
        1600°C
        Density 
        2.53
        refractive index 
        1.535
        storage temp. 
        2-8°C
        solubility 
        H2O: 1 M at 20 °C, clear, colorless
        form 
        Solid
        Specific Gravity
        2.532
        color 
        White
        PH
        11.16 (4g/l, H2O, 25℃)
        pka
        (1) 6.37, (2) 10.25 (carbonic (at 25℃)
        Water Solubility 
        22 g/100 mL (20 ºC)
        λmax
        λ: 260 nm Amax: 0.01
        λ: 280 nm Amax: 0.01
        Sensitive 
        Hygroscopic
        Merck 
        14,8596
        BRN 
        4154566
        Stability:
        Stable. Incompatible with powdered alkaline earth metals, aluminium, organic nitro compounds, fluorine, alkali metals, nonmetallic oxides, concentrated sulfuric acid, oxides of phosphorus.
        InChIKey
        CDBYLPFSWZWCQE-UHFFFAOYSA-L
        CAS DataBase Reference
        497-19-8(CAS DataBase Reference)
        NIST Chemistry Reference
        Sodium carbonate(497-19-8)
        EPA Substance Registry System
        Sodium carbonate (497-19-8)
        SAFETY
        • Risk and Safety Statements
        Symbol(GHS) 
        GHS07
        Signal word  Warning
        Hazard statements  H303-H319
        Precautionary statements  P264-P280i-P305+P351+P338-P280-P337+P313
        Hazard Codes  Xn,Xi
        Risk Statements  32-36-51/53-36/37/38-41-37/38
        Safety Statements  36/37-26-22-36-39
        RIDADR  UN 3082 9/PG 3
        WGK Germany  2
        RTECS  XN6476000
        3
        TSCA  Yes
        HS Code  28362000
        Toxicity LD50 orally in Rabbit: 4090 mg/kg
        NFPA 704
        0
        2 1

        Sodium carbonate price More Price(104)

        Manufacturer Product number Product description CAS number Packaging Price Updated Buy
        Sigma-Aldrich 13418 Sodium carbonate puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E500, anhydrous, 99.5-100.5% (calc. to the dried substance) 497-19-8 1kg-r $120 2019-12-02 Buy
        Sigma-Aldrich 13418 Sodium carbonate puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E500, anhydrous, 99.5-100.5% (calc. to the dried substance) 497-19-8 6x1kg-r $379 2019-12-02 Buy
        Alfa Aesar 010861 Sodium carbonate, anhydrous, Puratronic?, 99.997% (metals basis) 497-19-8 5g $43.7 2019-12-02 Buy
        Alfa Aesar 010861 Sodium carbonate, anhydrous, Puratronic?, 99.997% (metals basis) 497-19-8 25g $126 2019-12-02 Buy
        Strem Chemicals 93-1125 Sodium carbonate, anhydrous, 99.5+% (ACS) 497-19-8 2kg $158 2019-12-02 Buy

        Sodium carbonate Chemical Properties,Uses,Production

        Description

        Sodium carbonate (molecular formula: Na2CO3), is the water soluble sodium salt of carbonate. The pure product appears as a while, odorless powder with a strong alkaline taste. It has high hygroscopicity. It can be easily dissolved in water to form an aqueous solution with moderate alkalinity. Sodium carbonate has wide applications in various kinds of fields around the world. One of most important application of sodium carbonate is for the manufacturing of glass. Based on statistics information, about half of the total production of sodium carbonate is used for the manufacturing of glass. During the production of glass, sodium carbonate acts as a flux in the melting of silica. In addition, as a strong chemical base, it is used in the manufacturing of pulp and paper, textiles, drinking water, soaps and detergents and as a drain cleaner. In addition, it can also be used for tissue digestion, dissolving amphoteric metals and compounds, food preparation as well as acting as a cleaning agent. There are generally two ways for the production of sodium carbonate. One is through the reactions between sodium chloride and calcium carbonate (via the ammonia soda (Solvay) process). The other is from sodium carbonate and hydrogencarbonate ores (trona and nahcolite).

        Physical Properties

        The anhydrous salt is an odorless white powder; alkaline taste; hygroscopic; density 2.54 g/cm3; melts at 851°C; begins to loose CO2 well before melting; soluble in water; insoluble in alcohol; dissolves in acids liberating CO2.
        The monohydrate consists of colorless and odorless small crystals or cystalline powder; orthorhombic structure; refractive index 1.420; hardness 1.3 Mohs; density 2.25 g/cm3; loses water at 100°C becoming anhydrous; very soluble in water; insoluble in ethanol.
        The decahydrate consists of transparent crystals; effloresces on exposure to air; density 1.46 g/cm3; decomposes at 34°C; very soluble in water; insoluble in ethanol.
        Aqueous solutions are strongly alkaline.
        sodium carbonate powder
        sodium carbonate powder

        Uses

        Sodium carbonate is a kind of important raw material for chemical industry with wide application. It is the important raw material for making glass, soaps, detergents, textiles, leather, spices, dyes, medicines, etc.
        It can be used for analysis reagents and also used for the pharmaceutical industry and photoengraving.
        It is widely used in glass, chemicals, paper making, metallurgy, pharmaceutical, and textile as well as food industries.
        It is TV dedicated reagent.
        It can be used for the food industry as the neutralizing agent, leavening agents such as for the manufacture of amino acids, soy sauce and pasta such as bread, bread and so on. It can also be prepared to dubbed alkaline and add into pasta to increase the flexibility and ductility.
        As the detergent, it can be used for wool rinse. It can also be applied to bath salts and pharmaceutical use and also be used as the alkali agent of tanning.
        Sodium carbonate is most used in industry with a small part using by the civilian. In the soda ash of industry purpose, it is mainly applied to light industry, building materials and chemical industry, accounting for about 2/3: followed by metallurgy, textiles, petroleum, defense, and pharmaceutical. The glass industry is the largest soda consumer sector with each ton of glass consuming 0.2 ton of soda ash. In the chemical industry, it can be used for manufacturing of sodium silicate, sodium dichromate, sodium nitrate, sodium fluoride, baking soda, borax, and trisodium phosphate. In the metallurgical industry, it is mainly used for fluxing agent, mineral flotation agent, and desulfurization agent for steel and antimony. It can also be used as water softener in printing and dyeing industry. In tanning industry, it can be used for the degreasing of raw hides, neutralizing chrome tanned leather and improving the alkalinity of the chrome liquid. It is also used in the production of synthetic detergent additive sodium tripolyphosphate and other sodium salt.
        It can be used as a buffer, neutralizing agent and dough conditioner. It can be used in cakes and pastas. Make appropriate use it according to actual requirement of production.
        It is mainly applied to float glass, funnels, optical glass. It can also be used in other sectors of chemical industry and metallurgy industry. It can reduce the flying the alkali dust through application of heavy soda ash, and thus reducing the material consumption, improving the working conditions as well as improving product quality while reducing its erosion on the refractory material to extend the life of the furnace.
        It is a kind of basic chemical raw material which is widely used in medicine, paper making, metallurgy, glass, textiles, dyes and other industries and can be used as a leavening agent in food industry.
        It can be used as analytical reagents, dehydrating agent, and battery additives.

        Toxicity

        ADI (acceptable daily intake) make no restrictions (FAO/WHO in 1985). LD50 (median lethal dose) is about 6 g/kg (mice-oral).
        Soda ash dust has irritation effects on the skin, respiratory and eyes. Long-term exposure to soda solution may cause eczema and dermatitis. Its concentrated solutions can cause burns, necrosis, and even corneal opacity. The maximal allowable concentration of soda ash dust in the air is 2 mg/m3. The operators should wear overalls, door cover, gloves, boots and other protective clothing to protect the respiratory system and skin.

        Production method

        Sodium carbonate at present is mostly mined from its natural deposits. It also is manufactured syntheticallly by Solvay (or ammonia-soda) process. The natural production of sodium carbonate currently has supassed its synthetic production.
        The Solvay process involves a series of partial reactions. The first step is calcination of calcium carbonate to form lime and CO2. Lime is converted to calcium hydroxide. The most crucial step of the process involves reacting brine solution with carbon dioxide and ammonia to produce sodium bicarbonate and ammonium chloride. Sodium bicarbonate converts to sodium carbonate. The calcium hydroxide and ammonium chloride react to form calcium chloride as the by-product. The partial reactions are shown below:
        CaCO3 → CaO + CO2
        CaO + H2O → Ca(OH)2
        2NaCl + 2CO2 + 2NH3 + 2H2O → 2NaHCO3 + 2NH4Cl
        2NaHCO3 → Na2CO3 + H2O + CO2
        Ca(OH)2 + 2NH4Cl → CaCl2 + 2NH3 + 2H2O
        The overall reaction:
        CaCO3 + 2NaCl → Na2CO3 + CaCl2
        Sodium carbonate was made historically by the Leblanc process. The first commercial production was carried out by the Leblanc process. In this process, sodium chloride was treated with sulfuric acid to produce sodium sulfate and hydrochloric acid. Heating the sodium sulfate with coal and limestone produced a “black ash” that contained sodium carbonate, calcium sulfide, unreacted coal, and calcium carbonate. Sodium carbonate was separated from the black ash by leaching with water. The overall reaction is as follows:
        Na2SO4 + 2C + CaCO3 → Na2CO3 + CaS + 2CO2

        References

        https://en.wikipedia.org/wiki/Sodium_hydroxide#Uses
        http://www.essentialchemicalindustry.org/chemicals/sodium-carbonate.html

        Description

        Sodium carbonate is known as soda ash or washing soda and is a heavily used inorganic compound. Approximately 45 million tons of soda ash are produced globally both naturally and synthetically. Soda ash is obtained naturally primarily from the mineral trona, but it can also be obtained from nahcolite (NaHCO3) and salt brine deposits. Trona is a freshwater sodium carbonate-bicarbonate evaporite, with the formula Na3CO3HCO3 .2H2O. The largest known deposit of trona is located in the Green River area of Wyoming, and other large deposits are found in Egypt’s Nile Valley and California’s Searles basin around the city of Trona. Soda ash is produced from mined trona by crushing and screening the ore and then heating it. Th is produces a soda ash mixed with impurities. Pure soda ash is obtained by dissolving the product and precipitating impurities combined with filtering processes.

        Chemical Properties

        Sodium carbonate, Na2C03, also known as soda or soda ash,is the most important of the industrial alkalis. It is a white or grayish-white, lumpy, water-soluble powder that loses its water of crystallization when heated. It decomposes at a temperature of about 852°C (1560°F). It exists in solution only. It is prepared by the combination of carbon dioxide and water.

        Physical properties

        Carbonic acid has the formulaH2CO3 (equivalently OC(OH)2). It is also a name sometimes given to solutions of CO2 in water

        History

        Sodium carbonate, Na2CO3, has been used historically for making glass, soap, and gunpowder. Along with potassium carbonate, known as potash, sodium carbonate was the basis of the alkali industry, which was one of the first major chemical industries. Throughout history, alkalis were obtained from natural sources. Soda ash was also produced by burning wood and leaching the ashes with water to obtain a solution that yielded soda ash when the water was boiled off. The name soda ash originates from the barilla plant, which was used to produce soda ash. The scientific name of this plant is Salsola soda, but it goes by the common names of sodawort or glasswort because the soda produced from it was used in making glass. Barilla is a common plant found in saline waters along the Mediterranean Sea in Spain and Italy. Barilla was dried and burned to produce soda ash. The depletion of European forests and international disputes made the availability of alkali salts increasingly uncertain during the latter part of the 18th century. LeBlanc proposed a procedure in 1783, and a plant based on LeBlanc’s method was opened in 1791. Unfortunately, LeBlanc’s association with French Royalty led to the confi scation of the plant at the time of the French Revolution. Furthermore, confl icting claims for LeBlanc’s method were made by several other chemists and he never received the reward.

        Uses

        Soda ash is used in glass making, in production of sodium chemicals (such as sodium chromates, phosphates, and silicates), in the wood pulp industry, in production of soaps and detergents, in oil refining, in water softening, and in refining of nonferrous metals. In its hydrous crystallized form (Na2C03.10H2O), it is known as sal soda,washing soda,or soda crystals, not to be confused with baking soda,which is sodium hydrogen carbonate or sodium bicarbonate (NaHC03). Its monohydrate form(Na2C03·H20) is the standard compound for scouring solutions.
        When in solution, sodium carbonate creates less alkalinity than the hydroxides. A 0.1% solution creates a pH of 11;a fully saturated solution is 35%, which has a pH of 12.5.
        The safety requirements for sodium carbonate, because of its lower alkalinity, can be considered less demanding than those for the related bicarbonates.

        Uses

        Sodium Carbonate is an alkali that exists as crystals or crystalline powder and is readily soluble in water. it has numerous functions: an antioxidant, a curing and pickling agent, a flavoring agent, a processing aid, a sequestrant, and an agent for ph control. it is used in instant soups to neutralize acidity. it is used in alginate water des- sert gels to sequester the calcium, allowing the alginate to solubilize. it is also used in puddings, sauces, and baked goods.

        Uses

        Sodium carbonate is also known as washing soda or carbonate of soda, sodium carbonate is a white crystal or powder made by converting salt into sodium sulfate, which was followed by roasting with limestone and coal. It is soluble in water and glycerin but not alcohol. Sodium carbonate was used as a pH modifier in toning baths and as the primary alkali in developers used for gelatin emulsions.

        Uses

        Carbonic acid is used in the manufacture of soft drinks, inexpensive and artificially carbonated sparkling wines, and other bubbly drinks.

        Production Methods

        Sodium carbonate is produced on all continents of the world from its minerals. It is present in large deposits in Africa and the United States as either carbonate or trona, a mixed ore of equal molar amounts of carbonate and bicarbonate. However, about 70% of the world production of sodium carbonate is manufactured by the Solvay (ammonia soda) process, whereby ammonia is added to a solution of sodium chloride. Carbon dioxide is then bubbled through to precipitate the bicarbonate (NaHCO3) that is decomposed by heat-producing sodium carbonate. In the United States. all production is based on the minerals that contain sodium carbonate. Different qualities of sodium carbonate are produced: technical, food, and pharmaceutical grades.

        Definition

        A dibasic acid formed in small amounts in solution when carbon dioxide dissolves in water: CO2 + H2O?H2CO2 It forms two series of salts: hydrogencarbonates (HCO3–) and carbonates (CO32-). The pure acid cannot be isolated.

        Definition

        carbonic acid: A dibasic acid,H2CO3, formed in solution when carbondioxide is dissolved in water:
        CO2(aq) + H2O(l) →H2CO3(aq)
        The acid is in equilibrium with dissolvedcarbon dioxide, and also dissociatesas follows:
        H2CO3→H+ + HCO3-
        Ka = 4.5 × 10–7 mol dm–3
        HCO3→CO32–+ H+
        Ka = 4.8 × 10–11 mol dm–3
        The pure acid cannot be isolated,although it can be produced in ethersolution at –30°C. Carbonic acid givesrise to two series of salts: the carbonatesand the hydrogencarbonates.

        Definition

        sodium carbonate: Anhydrous sodium carbonate (soda ash, sal soda) is a white powder, which cakes and aggregates on exposure to air due to the formation of hydrates. The monohydrate, Na2COH2O, is a white crystalline material, which is soluble in water and insoluble in alcohol; r.d. 2.532; loses water at 109°C; m.p. 851°C.
        The decahydrate, Na2CO3·10H2O (washing soda), is a translucent efÛorescent crystalline solid; r.d. 1.44; loses water at 32–34°C to give the monohydrate; m.p. 851°C.
        Sodium carbonate may be manufactured by the Solvay process or by suitable crystallization procedures from any one of a number of natural deposits, such as:
        trona (Na2CO3·NaHCO3·2H2O),
        natron (Na2CO3·10H2O),
        ranksite (2Na2CO3·9Na2SO4·KCl),
        pirsonnite (Na2CO3·CaCO3·2H2O),
        gaylussite (Na2CO3·CaCO3·5H2O).
        The method of extraction is very sensitive to the relative energy costs and transport costs in the region involved. Sodium carbonate is used in photography, in cleaning, in pH control of water, in textile treatment, glasses and glazes, and as a food additive and volumetric reagent.

        Safety Profile

        Poison by intraperitoneal route. Moderately toxic by inhalation and subcutaneous routes. Mlldly toxic by ingestion. Experimental reproductive effects. A skin and eye irritant. It migrates to food from packagmg materials. Can react violently with Al, P2O5, H2SO4, F2, Li, 2,4,6-trinitrotoluene. When heated to decomposition it emits toxic fumes of Na2O

        Purification Methods

        It crystallises from water as the decahydrate which is redissolved in water to give a near-saturated solution. By bubbling CO2, NaHCO3 is precipitated. It is filtered off, washed and ignited for 2hours at 280o [MacLaren & Swinehart J Am Chem Soc 73 1822 1951]. Before being used as a volumetric standard, analytical grade material should be dried by heating at 260-270o for 0.5hour and allowed to cool in a desiccator. It has a transition point at 450o, and its solubility in water is 21.58% at 20o (decahydrate in solid phase), 49.25% at 35o (heptahydrate in solid phase) and 44.88% at 75o(monohydrate in solid phase) [D.nges in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 987-988 1963]. After three recrystallisations, technical grade Na2CO3 had Cr, Mg, K, P, Al, W, Sc and Ti at 32, 9.4, 6.6, 3.6, 2.4, 0.6, 0.2 and 0.2 ppm respectively; another technical source had Cr, Mg, Mo, P, Si, Sn and Ti at 2.6, 0.4, 4.2, 13.4, 32, 0.6, 0.8 ppm respectively.

        Sodium carbonate Preparation Products And Raw materials

        Raw materials

        Preparation Products


        Sodium carbonate Suppliers

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        Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
        2019-04-02 Sodium carbonate; In stock GMP Factory
        497-19-8
        US $1.00 / KG 1KG High quality manufacturer TOP 3 largest production factory in China Chemwill Asia Co.,Ltd.
        2019-11-06 sodium carbonate
        497-19-8
        US $0.00 / KG 1KG 99.5% 46tons Hebei Xibaijie Biotechnology Co., Ltd.
        2019-11-01 sodium carbonate
        497-19-8
        US $300.00 / T 1T 99.2%min 20 tons Hebei Xibaijie Biotechnology Co., Ltd.

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