Sodium bicarbonate; Features and applications

What is sodium bicarbonate? Everything about baking soda

Properties, characteristics, and applications

What is sodium bicarbonate? Is sodium bicarbonate a mineral? Sodium bicarbonate name: IUPAC: sodium hydrogen carbonate (usually known as baking soda or soda bicarbonate), is a chemical compound with formula NaHCO3. This compound is a mineral salt composed of sodium cation (Na+) and bicarbonate anion (HCO3–).

Baking soda is a white solid with a crystalline appearance, however, it is sold as a powder with fine grains. Baking soda is a little salty and has almost alkaline property. Mineral compound containing this salt is found in salty water springs and mineral springs.

A look at sodium bicarbonate history

What is sodium bicarbonate? In 1791, French chemist “Nicholas Leblanc” could for the first time produce sodium carbonate which is called soda ash. In 1846, two American bakers, “John Dwight” and “Austin Church” established the first baking soda production factory of sodium carbonate and carbon dioxide in America.

Is sodium bicarbonate a mineral? Sodium bicarbonate was introduced by a person named Rudyard Kipling in 1800s. A compound which could be used in commercial fishing in order to prevent decaying of newly hunt fish. This application was the widest usage cases of sodium bicarbonate at that time.

In 1919, an American senator announced that baking soda can cure Spain Flue! Some studies of that time showed what baking soda is and what treatment effects does it have for diseases like flue.

Sodium Bicarbonate production methods

1. Baking soda production in industry (sodium bicarbonate industry):

In order for you to better understand what sodium bicarbonate is, it is necessary to get familiar with this substance production. Sodium bicarbonate is industrially produced of sodium carbonate:

Na2CO3 + CO2 + H2O →2 NaHCO3

Soda ash extracted as Trona mine stone, is solved in water and treated with carbon dioxide. Solid Sodium bicarbonate is extracted of this solution as sediment.

About Solvay procedure, sodium bicarbonate is a mediatory compound in sodium chloride, ammonia gas and carbon dioxide compound. However, this product has less purity (75 percent):

NaCl + CO2 + NH3 + H2O → NaHCO3 + NH4Cl

Although it does not have significant commercial and productive value, however, sodium bicarbonate is also made of carbon dioxide reaction with sodium hydroxide water solution:

CO2 + NaOH → NaHCO3

2. Sodium bicarbonate production through extraction of the mine:

Nahcolite natural mineral deposits contain sodium bicarbonate mineral compound. These mines are created in Eocene period at the time of forming green river in Colorado. These sediments are deposited overtime as a result of river bed evaporation. Sodium bicarbonate commercial extraction in this region is performed using normal techniques of underground extraction such as cavity extraction, drum excavation, and longitudinal extraction like coal extraction.

Limited amounts of the product are received on the surface with extraction of bicarbonate sodium solution through warm water pumping of Nahcolite beds and retrieving “Nahcolite” solved in the surface. This extraction is performed through a crystallization procedure with natural cooler.

Baking soda properties and applications

What is sodium bicarbonate? Sodium bicarbonate is an amphoteric compound. Due to Carbonic Acid and hydroxide ion formation, water solutions are almost alkaline.

Sodium bicarbonate could be used as washing factor for eliminating any acid impurities of “raw liquids” and production of a more pure sample. Sodium bicarbonate and acid reaction produces a mineral salt and carbonic acid which is easily analyzed to carbon dioxide and water:

NaHCO3 + HCl → NaCl + H2CO3

H2CO3 → H2O + CO2

Sodium bicarbonate reacts to acetic acid (present in vinegar) and produces sodium acetate, water and carbon dioxide:

NaHCO3 + CH3COOH → CH3COONa + H2O + CO2

Sodium bicarbonate reacts to bases such as sodium hydroxide and compose carbonates:

NaHCO3 + NaOH → Na2CO3 + H2O

Thermal analysis of sodium bicarbonate

In 80-100 Celsius degrees (176-212 Fahrenheit degrees), sodium bicarbonate is slowly analyzed to sodium carbonate, water and carbon dioxide. This transformation speed is more in 200 Celsius degrees temperature (392 Fahrenheit degrees):

2 NaHCO3 → Na2CO3 + H2O + CO2

Through more heating, carbonate is transformed to oxide (more than 850 Celsius degrees):

Na2CO3 → Na2O + CO2

Sodium bicarbonate physical and chemical characteristics

Compound name Sodium bicarbonate iupac id
Sodium hydrogen carbonate Other names:
Nahcolite-soda bicarbonate-bicarbonate- bakery baking soda Identification index CAS Number 144-55-8 EC Number 205-633-8 E number E500 PubChem CID 516892 Properties and characteristics Sodium bicarbonate formula NaHCO3 Molar scale 84.0066 g mol−1 Apparent form White Crystallines Odor Odorless Density 2.20 g/cm3 Melting point Analyzed to sodium carbonate from 50 celsius degrees Solubility in water 69 g/L (0 °C)
96 g/L (20 °C)
165 g/L (60 °C) solubility 0.02 wt%acetone
2.13 wt% in Methanol in -22 °C
Insoluble in Ethanol Structural property Crystal structure Mono crystal Thermochemical Thermal capacity (c) 87.6 J/mol K Molar entropy (S

o

298) 101.7 J/mol K Formation standard enthalpy(ΔfH⦵298) −950.8 kJ/mol Gibbs free energy (ΔfG˚) −851.0 kJ/mol Related compounds anions Sodium carbonate cations Ammonium bicarbonate
Potassium bicarbonate

Other similar compounds

Sodium bisulfate
Sodium hydrogen phosphate

Baking soda applications/ what are sodium bicarbonate applications?

1. Sodium bicarbonate application in food industries

Sodium bicarbonate is baking soda or sodium hydrogen carbonate. This industrial ingredient is used in edible grade, mainly in making bread and bakery. It can be used as baker’s yeast, (welding in bread dough, buffer atmosphere). Other cases could be seen bellow:

• Sodium bicarbonate as ingredient in making baking powder:

Necessary in dough volume increase in making different types of bread, cookie, cake, cracker and wafer, and baking powder. Baking powder consists of three types of main composing substances:

A main factor: sodium bicarbonate

An acidic factor: for instance, Sodium Acid Pyrophosphate (SAPP) or citric acid

A volume factor: for instance, cornstarch

Standard relation is 30/40/30 weight percent (starch/ Sodium Acid Pyrophosphate/sodium bicarbonate). Yeast action is along with Carbon dioxide freedom. These reactions could be seen in the following figures:

Two chemical reactions (2a and 2b reactions):

2a reaction for carbon dioxide has higher performance than 2b. 2a reaction starts when modifiers are solved at the time of dough provision. 2b reaction starts with being heated.

2a reaction amount depends on different parameters including selection of the acidic substance and sodium bicarbonate particles size. Sodium bicarbonate with larger particles has more dissolution time than smaller ones (see the following table) & so, it affects reaction speed. Reaction speed for larger particles is slower than smaller ones.

However, it should be noted that in case of excessive sodium bicarbonate existence, an undesirable reaction occurs (see the following figure reaction).

This is a saponify reaction between sodium bicarbonate and free fatty acid existing in formulation (=fatty acid which is made up of substances like butter or cream). This reaction produces a fatty acid salt which induces undesired taste like metal taste in boiled substances.

• Baking soda as PH buffer in food industries:

Sodium bicarbonate could be used as PH buffer. This means it can regulate and maintain solution PH.

With such property, some nutrients formulations contain sodium bicarbonate as PH buffer. All types of ready to cook noodle, and also energy drinks and ready coffee or tea contain this compound. Therefore, using sodium bicarbonate has two main benefits. The first point is better control of final product PH so that it makes edible product better consistency and shelf life feasible.

Sodium Bicarbonate regulates PH and prevents creation of an acidic environment which leads to bacteria augmentation. Secondly, sodium bicarbonate makes a better feeling in the individual in digestion.

• Sodium bicarbonate agent of “foam or gas” creation in nutrients:

Chemical reaction which occurs in production of foam or ebullition in making bread or cake is the same as 2a reaction which was mentioned in the previous section. Sodium bicarbonate and an acidic factor react with each other in order to free carbon dioxide.

This property is used for carbonated drinks formulation. It is due to these reactions effect that carbon dioxide solved in drinks is freed as gas bubble.

This eruption property is also used for producing foam in powder drinks such as cappuccino or powder energy drinks. This reaction is occurred when powder is mixed in water.

Powder baking soda has faster dissolution time in water and produces strong foam with fast spark impact. On the contrary, larger particles have longer dissolution time and produce weaker foam.

1. Sodium bicarbonate industrial applications

• Human body needs a determined PH criterion for health. When acidic nature is created more than usual in any of the body systems, sodium bicarbonate injection or pill can quickly counter body PH increase through forming an acidic/alkaline reaction. Kidney chronic diseases, heartburn, kidney stones, increase in uric acid and metabolic acidosis can all be cured with sodium bicarbonate.
• Sodium bicarbonate effectively cleans teeth and gums and decreases mouth natural acidity. If mouth acidity be more than natural amount, it can lead to mouth infections. Therefore, so many of toothpastes without fluoride have sodium bicarbonate.
• 25 percent of bestial baking soda used throughout the world is used as bestial food.
• In wool, silk and leather coloring, industrial grade sodium bicarbonate is used.
• In plastic production industries and complex polymers, sodium bicarbonate is used as purifier and catalyst. Sodium bicarbonate analysis leads to carbon dioxide freedom. This feature is often used in plastic and rubber production.
• While cooking pea or other vegetables, sodium bicarbonate is added in order for these vegetables to get smoother.
• Baking soda and olive mixture leads to olives texture smoothness and fragility.
• Most of the products which eliminate face spot have baking soda as one of their ingredients in formulation.
• Sodium bicarbonate controls sulfide odor existing in drainage refineries. Besides, it counters micro-organisms biologic growth.
• Due to pH increase, suitable alkalinity of water and sodium bicarbonate is maintained through filtration.
• From the chemical point of view, sodium bicarbonate is used for desulfurization in the way of deferent chimney. This procedure refines industrial gases before being spread in atmosphere.
• Sodium bicarbonate infective property has lead to its invaluableness in drug industries. This compound eliminates bacteria and funguses through sterilization.
• Libraries managers and book collectionaires know that the oldness odor in damaged or older books is eliminated through sprinkling sodium bicarbonate among book sheets.
• Dry fire fighting capsules which contain chemical substance used in houses and careers have sodium bicarbonate for confronting fire derived from electrical flow.

Sodium bicarbonate safety

Sodium bicarbonate makes eyes and skin irritation. It could be harmful if absorbed through the skin. In case of accidental swallow, it would be harmful. The main impact is alimentary tract irritation.

Chronic damages due to long term contact with this mineral substance includes liver and kidney injury.

• Baking soda chemical consistence:

Sodium hydrogen carbonate is analyzed while heated. This compound might be analyzed within humid weather or water.

Prevent this substance contact with unsuitable substances. Dust production, within excessive heat, temperature more than 50 Celsius degrees (122 Fahrenheit degrees), facing moist weather or water, are unsuitable factors for this compound.

Sodium bicarbonate is unsuitable with other substances such as strong oxidizer factors, acids, mono ammonium phosphate, sodium and potassium alloy.

Dangerous products analyzed of this compound include carbon monoxide and carbon dioxide.

Baking soda packing

Sodium bicarbonate packings exist in polyethylene or polypropylene bags weighing 25 kg and 50 kg along with shrink cover and on pallet and also 1000 gr jumbo bag.

Sodium carbonate packages in the weight less than 1 kg are currently offered in 500 gr weight. This product has laboratory grade and is made in Germany.

Sodium bicarbonate maintenance conditions

The environment for maintaining packages and bags special for sodium bicarbonate must have suitable ventilation. Minimize dust production and gathering for this substance. Be careful that this compound is not in contact with your eyes and skin and if it gathered on your cloth, quickly change and wash your clothes.

Sodium bicarbonate packages must be kept in dry and cool place and dish door be firmly closed.

Market, buy and sale and export status of sodium bicarbonate

Sodium bicarbonate is one of the most common and used industrial chemical compounds. This substance exists in the market in edible, industrial and laboratory grade. Drug version of sodium bicarbonate could be mentioned as this compound edible grade. Sodium bicarbonate is used so much in foods. Baking soda with Sachi, Pars, and Fajr-e parsian brands is presented in market.

Baking soda marketing is possible in client needed packages. For receiving update price and acquaintance with method of ordering this substance, you can refer to “Shimico” website, industrial chemical substances commerce reference.

Top 10 sodium bicarbonate suppliers in Iran

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