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Borax is the crystallization of mineral borax, which is mainly used for a wide range of purposes. In the industrial field, borax is often used as a detergent, preservative and water softener. In the glass industry, it can increase the transparency and heat resistance of glass, making glass products more beautiful and durable. In the enamel industry, it can make the enamel stronger and shinier.
In medicine, borax has the effect of clearing away heat and detoxifying, reducing swelling and antiseptic. It is often used to treat sores in the mouth, sore throat, red eye and so on. When used externally, it can be ground and spread or adjusted to promote wound healing by its sterilization and disinfection.
In the food industry, borax has been improperly used to increase the toughness, brittleness and preservation of food. However, due to its toxicity, excessive intake can harm human health and affect the digestive, nervous and endocrine systems. It is now strictly prohibited to use it as a food additive.
"Tiangong Kaiwu" does not elaborate on the use of borax, but in the application of traditional processes, borax can be used as a flux in metallurgy to reduce the melting point of metals, making metals easier to melt and process, which helps to improve the quality and production efficiency of metal products.

Mercury is a highly toxic substance, which is extremely harmful to the human body and the environment, and must not be sold at will. The synthesis of mercury cyanate is also strictly prohibited today. Due to its complex and extremely dangerous synthesis process, it is difficult for me to describe its synthesis method in detail.
In the past, although there were warlocks or craftsmen who studied such things, in today's world, science is prosperous and laws are strict, and such harmful and toxic substances are strictly controlled. The synthesis of mercury and mercury cyanate not only violates the law, but also causes irreparable disasters to the ecological environment and people's health. We should follow the current laws and scientific principles and not get involved in such dangerous and harmful things. Although the ancients may have explored chemical synthesis, the times have changed, and today's understandings and norms are quite different. We should conform to the times, cherish life and the environment, and not explore prohibited and harmful syntheses.

Borax is the crystallization of mineral borax refined. Its cold, sweet and salty taste belongs to the lung and stomach meridians.
The physical properties of borax are unique. Its crystals are often plate-like or columnar, and the aggregate is granular, soil-like or skin-shell-like. The color is mostly white or colorless, and sometimes light gray, light yellow, light blue, light green, etc. due to impurities. Borax has a glassy luster, transparent to translucent. Its hardness is low, Mohs hardness is about 2-2.5, and scratches can be left on its surface with nails. The specific gravity is about 1.69-1.72, relatively light. Borax is easily soluble in water, and its aqueous solution is alkaline, and its solubility is higher in hot water.
Boric anhydride, namely diboron trioxide ($B_2O_3 $), is the main oxide of boron. Its normal state is colorless glass-like crystals or powders. Boric anhydride has a high melting point, about 1275 ° C, and a boiling point of 1860 ° C. It is relatively stable at room temperature, but at high temperatures it can react with many metal oxides to form borates with special properties. Boric anhydride has strong water absorption and can quickly absorb moisture in the air and transform into boric acid ($H_3BO_3 $), so it is often used as a desiccant. It also has good heat resistance and chemical stability. It is widely used in ceramics, glass and other industrial fields, which can improve the heat resistance and chemical corrosion resistance of products.

Boronimidazole is a class of heterocyclic compounds containing boron, which has its uses in many fields.
Cyanate ester is widely used. In the aerospace field, this material is the best choice for aircraft manufacturing due to its high specific strength, high specific modulus, high temperature resistance and excellent dielectric properties. Cyanate ester-based composites are commonly used in aircraft body structures, wings and other components, which can reduce body weight and increase flight performance. In harsh environments such as high temperature and high humidity, they can maintain structural stability and good electrical properties.
In the field of electronics and electrical, cyanate esters also show their talents. Due to its low dielectric constant, low dielectric loss, and good heat resistance and mechanical properties, it is often used as a substrate for printed circuit boards (PCBs). In PCB manufacturing of high-frequency and high-speed circuits, cyanate esters can reduce signal transmission loss and increase signal transmission speed to meet the needs of high-speed and miniaturized development of electronic equipment.
Furthermore, in the automotive industry, cyanate ester materials can be used to manufacture automotive engine parts, body structural parts, etc. Its good heat resistance and mechanical properties can improve the performance and service life of automotive parts, and its lightweight characteristics can help reduce automotive energy consumption, which is in line with the current development trend of energy conservation and environmental protection in the automotive industry.
In addition, in the field of advanced composites, cyanate esters can be combined with carbon fiber, glass fiber and other reinforcing materials to obtain high-performance composites, which are used in sporting goods, medical apparatus and other fields, such as high-end tennis rackets, golf clubs and some medical apparatus parts, etc., can give products good performance and quality.

It has the effect of dispelling wind and cold, passing through the orifice and relieving pain, reducing swelling and discharging pus. Looking at the market today, although it is not as prosperous as it used to be, it is still valued by doctors in medical clinics and pharmacies for specific diseases, and there are many people who want to buy it.
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< b In the field of proprietary Chinese medicine, many well-known proprietary Chinese medicines, such as Chuanxiong Cha Tiao San and Zhengtian Pill, are used as the main medicine for the treatment of headache, rheumatism pain and other diseases. The sales volume is quite good and the market is broad. In the clinical practice of traditional Chinese medicine, traditional Chinese medicine practitioners are also flexible and compatible according to the patient's disease.
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It is not only favored in the domestic market, but also in the international market. With the overseas spread of traditional Chinese medicine culture, foreign awareness and demand for Chinese herbal medicines such as Ligusticum are also gradually increasing. However, its market development also faces challenges. Issues such as the protection of wild resources, the standardization of artificial planting, and the unification of Quality Standards need to be properly addressed to ensure that the Ligusticum market can prosper for a long time and benefit more patients.