Propane 1 Chloro 3 Iodo

Mercury, commonly known as mercury, is the only metal that is liquid at room temperature and pressure. Its chemical properties are unique and quite amazing.
Mercury is chemically stable, and it is difficult to react with oxygen at room temperature. However, under heating conditions, mercury can combine with oxygen to form mercury oxide. This reaction is like a wonderful change. Mercury is like a dancer. Under the enthusiastic invitation of flames, it dances hand in hand with oxygen to change the new material form of mercury oxide.
Although mercury is chemically stable, it can form alloys with a variety of metals, namely amalgam. This property is like mercury has a magical fusion magic, which can absorb different metals and form unique amalgam. Metals such as gold and silver can form amalgam with mercury, which is widely used in the fields of metallurgy and alchemy in the past.
Mercury also has certain oxidizing properties. In a specific chemical reaction, mercury can capture electrons from other substances and reduce itself. For example, when reacting with some metals, mercury can oxidize the metal and reduce its own valence.
Furthermore, the compounds of mercury are diverse in nature. Mercury chloride is one of the common mercury compounds, which is toxic and has good solubility in water. Mercury sulfide has high stability and bright colors, and is often used as a pigment.
Mercury has unique and complex chemical properties and plays an important role in many fields. However, due to its toxicity, it must be used and handled with extreme caution.

Although the concept of "caustic soda", "calcined calamine" and other specific modern chemical substances is not explicitly mentioned in "Tiangong Kaiwu", it can be tried to express its physical properties in ancient Chinese according to traditional craftsmanship and chemical principles.
Those who have caustic soda are highly corrosive, touch the skin, and immediately see damage, and their properties are as intense as fire. The color is often white, and the texture is mostly solid. When exposed to water, it becomes extremely hot, such as boiling soup and boiling, water vapor evaporates. It is very easy to dissolve in water, and the solution formed is extremely alkaline, which can dissolve oil stains. If oil stains accumulate in utensils, use its solution to cleanse them, and it must be cleaned in an instant. And caustic soda can react with many substances. If it encounters acids, it will change dramatically, just like water and fire, and it will turn into other things in an instant.
Let's talk about calamine, calamine is originally a ore, its color is green or white, and its texture is firm and brittle. After calcination, its physical properties change greatly. Its texture turns loose, and its color often changes, or it is slightly yellow. Calamine has adsorption properties. In pharmaceuticals and other things, it can absorb impurities and make the medicine purer. And in metallurgy, it is also useful, which can help metal separation and purification, such as clearing the clouds and seeing the sun, making the quality of the metal more refined. Although "Tiangong Kaiwu" does not have the accurate chemical description of modern times, it can be observed that its physical properties are probably the same from the perspective of ancient craftsmanship.

Cormorants, also known as water crows and ospreys, are mainly used for fishing.
Cormorants are good at diving, and their feathers are waterproof and can swim in the water for a long time to hunt down fish. Fishermen often tame cormorants to help fish. When taming cormorants, they usually tie a small rope ring around their neck. This rope ring is just the size to allow the cormorant to swallow small fish, while the big fish will be stuck in the throat and unable to swallow.
When fishing, fishermen row to the waters where the fish are infested and drive the cormorants into the water. With their keen eyesight, the cormorant quickly locks on the trail of the fish and catches the fish with its pointed and curved beak. When the cormorant catches a big fish, it cannot swallow the fish due to the restriction of the rope ring around its neck, so it can only return to the fishing boat. When the fisherman sees this, he will take out the big fish from the cormorant's throat, and at the same time reward the cormorant with some small fish. In this way, the cormorant can help the fisherman catch a lot of fish.
In the past, in many waters such as Jiangnan Water Township, cormorant fishing was a common fishing production method. This method not only shows the harmonious coexistence between man and nature, but also highlights the wisdom of the ancient people to skillfully use animal characteristics to meet the needs of production and life, which has become an important part of traditional fishing culture.

"Tiangong Kaiwu" is a scientific and technological masterpiece written by Song Yingxing in the Ming Dynasty. Although it does not specifically discuss the "synthesis method of caustic soda-3-pyridinone", its synthesis method can be inferred from the ancient chemical process ideas and related chemical principles.
In ancient times, chemical synthesis often relied on natural materials and simple means. Caustic soda, that is, sodium hydroxide, was often prepared by the reaction of plant ash (rich in potassium carbonate) and lime (calcium oxide) in ancient times. The plant ash is dissolved in water to obtain a potassium carbonate solution, mixed with lime milk, and precipitated, filtered, and concentrated to obtain caustic soda.
The synthesis of pyridinone substances is relatively complicated, and in ancient times it was started from natural nitrogen-containing organic matter. Pyridine rings can be converted from nitrogen-containing heterocyclic natural products through a series of reactions. For example, in some plants or microorganisms, nitrogen-containing raw materials can be extracted by fermentation, distillation, extraction, etc.
Suppose that natural products containing pyridine structure are taken as the starting material, and oxygen atoms are introduced at specific positions to form carbonyl groups through oxidation reactions, and then the pyridine ketone structure is formed. For example, a suitable substituted pyridine derivative is selected to oxidize with a mild oxidizing agent, such as oxygen in the air, under the action of a catalyst. The ancient catalyst may be a metal oxide, such as copper oxide, iron oxide, etc.
Or a pyridine ring skeleton can be constructed first, starting from a simple compound containing carbon and nitrogen. Using formaldehyde, ammonia, etc. as raw materials, under appropriate conditions, the pyridine ring is constructed by condensation reaction, and then the functional group is converted to pyridinone. The control of conditions is extremely critical, and the temperature, pH, etc. need to be finely adjusted. Ancient operation or based on experience and observation, through the control of heat and material ratio.
In the synthesis process, separation and purification are also important. In ancient times, distillation, crystallization, filtration and other methods were used. Distillation can separate different substances according to the difference in boiling point. Crystallization can separate and purify the product from the solution, and filter to remove insoluble impurities.
Although ancient technology is different from modern technology, the basic chemical principles are the same. With wisdom and practice, the ancients may be able to find a way to synthesize caustic soda and related structural substances containing pyridinone.

Mercury, commonly known as mercury, is a highly toxic substance. During storage and transportation, many things must be paid attention to.
Mercury is volatile and can evaporate into mercury vapor at room temperature. This vapor is highly toxic. Therefore, when storing mercury, the container must be well sealed to prevent mercury vapor from escaping and causing mercury pollution to the surrounding environment. Mercury should be stored in special thick-walled glass containers or metal containers. The container material should not chemically react with mercury and can withstand a certain pressure.
When transporting mercury, it should be carefully packaged. First fill it in a thick-walled glass or metal container, seal it tightly, and then place it in a sturdy outer package, surrounded by cushioning materials, such as foam plastics, sponges, etc., to prevent the container from bursting due to collision and vibration during transportation, and mercury leakage.
Whether stored or transported, the place should be kept cool, dry, and away from heat and fire sources. Due to the increase in temperature, mercury evaporates faster, increasing the risk of poisoning. And mercury should not be mixed or mixed with oxidizing substances, acids, etc., because it is easy to chemically react with these substances and generate more dangerous compounds.
Areas where mercury is stored and transported should be clearly marked to remind personnel not to approach, and professional protective equipment and emergency treatment tools should be equipped. In the event of a mercury leak, the on-site personnel should be evacuated immediately, ventilated quickly, and contacted professionals as soon as possible to clean up the leaked mercury according to scientific methods. They must not handle it blindly to avoid poisoning or the spread of pollution.