Sodium Bicarbonate

Sodium bicarbonate (sodium bicarbonate) is an inorganic compound, white powder or fine crystals, odorless, salty, easily soluble in water, slightly soluble in ethanol (some say insoluble), and the aqueous solution is slightly alkaline. It is easily decomposed by heat and slowly decomposes in humid air to produce carbon dioxide, about 50℃Start to decompose, heat to 270℃Complete decomposition 。It decomposes strongly when it meets acid, producing carbon dioxide. Sodium bicarbonate is widely used in chemical, pharmaceutical, food, light industry, textile and other industrial fields as well as people's daily life, and plays an important role in the national economy.

Application areas:

Laboratory use

Sodium bicarbonate can be used as an analytical reagent and also used in inorganic synthesis. It can be used to prepare sodium carbonate-sodium bicarbonate buffer solution. When a small amount of acid or alkali is added, the hydrogen ion concentration will not change significantly, which can keep the systempHThe value is relatively stable.

Industrial Uses

Sodium bicarbonate can be used to produce acid-base fire extinguishers and foam fire extinguishers. In the rubber industry, sodium bicarbonate can be used in rubber and sponge production. In the metallurgical industry, sodium bicarbonate can be used as a flux for casting steel ingots. In the machinery industry, sodium bicarbonate can be used as a molding aid for cast steel (sand casting) sand molds. In the printing and dyeing industry, sodium bicarbonate can be used as a color fixative for dyeing and printing, an acid-base buffer, and a post-treatment agent for fabric dyeing and finishing; adding baking soda to dyeing can prevent the yarn tube from producing color spots, and it can also be used as a detergent for wool.

Food processing applications

In food processing, sodium bicarbonate is the most widely used leavening agent, used in the production of biscuits, bread, etc. However, sodium carbonate will remain after the action. Excessive use will make the food too alkaline, resulting in a deterioration of flavor and a yellow-brown color. It is a generator of carbon dioxide in carbonated beverages; it can be combined with alum to form alkaline baking powder, and it can also be combined with soda ash to form civilian soda ash; it can also be used as a butter preservative. It can be used as a color preservative for fruits and vegetables in vegetable processing. Add about 0.1% when washing fruits and vegetables.~0.2%Sodium bicarbonate can stabilize the green color. When sodium bicarbonate is used as a fruit and vegetable treatment agent, it can stabilize the green color of fruits and vegetables by boiling and bleaching them.pHThe value increases, the water holding capacity of protein increases, the softening of food tissue cells is promoted, and the astringent components are dissolved. In addition, it has the effect of removing the smell of goat milk. The usage amount is 0.001%~0.002%。

Agricultural and animal husbandry use

Sodium bicarbonate can be used for seed soaking in agriculture, and can also make up for the lack of lysine in feed. Dissolving sodium bicarbonate in a small amount of water or mixing it into concentrate and feeding it to cattle (adding an appropriate amount) can promote the growth of cattle and significantly increase the milk production of dairy cows.

Medical Uses

Sodium bicarbonate can be used as a pharmaceutical raw material to treat hyperacidity and metabolic acidosis, and can also alkalize urine to prevent uric acid kidney stones. It can also reduce the renal toxicity of sulfonamides, prevent hemoglobin from depositing in the renal tubules during acute hemolysis, and treat symptoms caused by hyperacidity; intravenous drip has a non-specific therapeutic effect on drug poisoning such as barbiturates, salicylates, and methanol. However, it is contraindicated for gastric lavage in the event of ingestion of strong acid poisoning, and arrhythmias, muscle cramps, pain, abnormal fatigue and weakness, slowed breathing, bad breath, frequent urination, urgency, persistent headache, loss of appetite, nausea, vomiting, etc. may occur when injected in large quantities, in the presence of renal insufficiency, or used for a long time.