When the solution comes into contact with scale, there will be a chemical reaction between them, and the scale will be dissolved and removed.
Extended data:
Edible danger
Citric acid is an edible acid, which can enhance the normal metabolism in the body. Proper dosage is harmless to the human body. Adding citric acid to some foods tastes good and can stimulate appetite. In China, citric acid is allowed to be used in jam, beverage, canned food and candy.
Although citric acid has no direct harm to human body, it can promote the excretion and deposition of calcium in the body. For example, long-term consumption of foods containing citric acid may lead to hypocalcemia and increase the risk of duodenal cancer.
Children are characterized by nervous system instability, excitability and autonomic nervous disorder; Adults have hand and foot convulsions, muscle spasms, paresthesia, itching and digestive tract symptoms.
Based on the influence of citric acid on calcium metabolism, people who often eat canned food, drinks, jam and sour sugar, especially children, should pay attention to calcium supplementation, drink more raw milk, fish head and fish bone soup, and eat some small shrimps. , in order to avoid blood calcium deficiency, affecting health. Patients with gastric ulcer, hyperacidity, dental caries and diabetes should not eat citric acid often.
Citric acid cannot be added to pure milk, otherwise it will lead to the coagulation of pure milk. In the dairy industry, citric acid is often mixed into 10% solution, which is added to low-concentration milk solution and stirred quickly.
Reference source: Baidu Encyclopedia-citric acid