| CAS No.: | 144-55-8 |
|---|---|
| Formula: | Chnao3 |
| EINECS: | 205-633-8 |
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1. Sodium bicarbonate, with the chemical formula NaHCO, is a white crystalline powder. It is odorless, tastes salty and alkaline, and has a relatively high solubility in water, with its aqueous solution being weakly alkaline.
2. In the food industry, sodium bicarbonate is a crucial additive. As a leavening agent, during the production of baked goods such as bread, cakes, and biscuits, it decomposes upon heating according to the reaction: $2NaHCO_{3}\xlongequal{\Delta}Na_{2}CO_{3}+H_{2}O + CO_{2}\uparrow$. A large amount of carbon dioxide gas is released, and these gases form evenly distributed bubbles in the dough or batter. As the baking process progresses, the bubbles expand and set due to heat, resulting in a rich and fine pore structure inside the food, making the texture of the food soft and fluffy, significantly improving the taste and giving it a more appealing appearance. For example, when an appropriate amount of sodium bicarbonate is added during the making of traditional steamed buns, the volume of the buns increases and the texture becomes soft. Meanwhile, as an acidity regulator, sodium bicarbonate can precisely control the acidity and alkalinity of the food system. In some food systems with relatively strong acidity, such as the production process of certain fruit juice drinks or acidic sauces, it can react with the acidic components to neutralize them and adjust the pH value to an appropriate range. This not only prevents food spoilage caused by excessive acidity but also optimizes the flavor and taste of the food, making the balance between sweetness and acidity more harmonious and enhancing the consumers' eating experience.
3. In the medical field, sodium bicarbonate is mainly used to relieve the symptoms of excessive stomach acid. The human stomach secretes stomach acid (mainly hydrochloric acid) to aid digestion. However, when too much stomach acid is secreted, it can cause discomfort such as heartburn, acid reflux, and stomach pain. At this time, after taking sodium bicarbonate orally, it will quickly react chemically with the stomach acid according to the reaction: $NaHCO_{3}+HCl = NaCl + H_{2}O+CO_{2}\uparrow$. By neutralizing the stomach acid, it alleviates the acidic irritation in the stomach and thus relives the above-mentioned discomfort symptoms, playing an active role in the adjunctive treatment of some stomach diseases. However, since carbon dioxide gas is produced when it neutralizes the stomach acid, for patients with stomach diseases such as gastric ulcers, the gas pressure may aggravate the condition. Therefore, it should be used with caution under the guidance of a doctor.
4. In the chemical industry, sodium bicarbonate is a commonly used buffer. In many chemical reactions, the stability of the pH value of the reaction system is crucial for the progress and outcome of the reaction. The sodium bicarbonate solution can resist the drastic changes in the pH value of the solution caused by the addition of a small amount of strong acid or strong alkali to a certain extent. When a small amount of acid or alkali from the outside enters the system, sodium bicarbonate can react with it through its own acid-base balance adjustment mechanism, thereby maintaining the pH value of the solution within a relatively stable range, providing a stable acid-base environment for the chemical reaction and ensuring that the reaction can proceed smoothly as expected. For example, in some biochemical experiments or certain chemical reactions in the pharmaceutical industry, this buffering effect can ensure the stability of bioactive substances or drug intermediates in the reaction system, improving the yield and product quality of the reaction. In addition, sodium bicarbonate is also used in other industrial fields. For example, it can be used for the hair removal and neutralization processes in leather processing, as a component of some fire extinguishers in the fire protection field, and for treating acidic wastewater in the environmental protection field. Its wide range of applications makes it an indispensable chemical raw material in many industrial production processes.
| Item | The National Standard | Result |
| The Total Alkalinity Content(NaHCO3)% | 99.0-100.5% | 99.61% |
| Chloride(Cl) | 0.4% max | 0.22% |
| Loss On Drying% | ≤0.20% | 0.091% |
| PH Value(10g/l) Solution | ≤8.6 | 8.21 |
| Arsenic Content%(As) | ≤0.0001% | PASS |
| Heavy Metal Content%(Pb) | ≤0.0005% | PASS |
| Ammonium Salt | -- | PASS |
| Whiteness | >84 | 95 |
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