THIOPHENE-2-CARBOXYLIC ACID CHLORIDE

What are the main uses of cyanoside-2-cyanate ions? It is stated in Tiangong Kaiwu: Cyanoside substances can be hydrolyzed to obtain cyanate ions. Cyanate ions are widely used in industrial fields and are often used as metal surface treatment agents. If you want to make the metal surface stronger and more durable, you can use cyanate ion-containing chemicals to form a dense protective film on the metal surface, enhance its corrosion resistance, and make the metal utensils last forever, just like a layer of solid armor.
In the metallurgical industry, cyanate ions play a key role. In gold mining, the special affinity of cyanate ions for gold can be used to extract gold from ore efficiently. This process is like panning for gold in the sand. Cyanate ions can accurately capture gold elements, greatly improve the extraction efficiency and purity of gold, and provide high-quality raw materials for gold smelting.
Furthermore, in the field of organic synthesis, cyanate ions are also important reagents. The synthesis of many organic compounds is inseparable from it, and it can participate in a variety of chemical reactions to build complex organic molecular structures. With the characteristics of cyanate ions, chemists can ingeniously create organic compounds with specific functions and properties, such as certain drugs, dyes, etc., which bring many conveniences and benefits to human life.
However, it should be noted that cyanate ions are toxic, and strict operating procedures must be followed when using them, and safety precautions must be taken to prevent harm to the human body and the environment.

Mercury is one of the chemical elements, commonly known as mercury. There are many compounds of mercury, among which mercury cyanide has unique physical properties.
Mercury cyanide is white and crystalline, with a delicate appearance, like the first snow in winter, with a uniform texture. It is quite stable at room temperature, but it is easy to decompose when heated, just like spring ice when warm, gradually melting and formless.
When it comes to solubility, mercury cyanide is soluble in water, just like salt melts in water and quietly becomes one, but its dissolution rate is not overnight, and it takes time to completely dissolve. In organic solvents, such as ethanol and ether, mercury cyanide also has a certain solubility, but its degree of solubility may be different compared to water.
The density of mercury cyanide is higher than that of ordinary substances, and it feels heavy, like holding a stone in the hand. This is because the atoms in it are tightly arranged and the structure is dense. Its melting point is quite high, and it needs to be roasted in a hot fire before it can be melted into a liquid state, just like pure gold needs to be refined before it can see its true form.
Although mercury cyanide has such physical properties, it is very toxic, like an invisible blade. If you are not careful, contact, inhalation or ingestion can cause poisoning and endanger life. Therefore, when using and storing, you should be extremely cautious and follow strict procedures to prevent unexpected disasters.

The method of making mustard, if you want to get the best, you need to understand the reason and follow the method.
Take the mustard first, and choose the fresh and disease-free ones. After washing, put it in a ventilated place to dry for a while, remove the water from its surface, but it is not too dry, and it is better to keep a little moist.
Prepare a clean urn, put salt into the urn, about two taels of salt per catty of mustard. Sprinkle the salt evenly on the mustard, and rub it by hand to make the salt taste gradually enter. When rubbing, you can see that the mustard gradually produces juice water, which is caused by the penetration of salt.
After kneading, put the mustard into the urn, and arrange it tightly layer by layer. Coat it with a clean cloth, and then suppress it with a slate, so that the mustard is under even pressure.
Then, place the urn in a cool place, avoiding direct sunlight. After about ten days, the color of mustard greens gradually changes, and the taste gradually emerges. At this time, when you open the urn and look at it, you will see that mustard greens have a salty taste, but it is not enough.
Then use pepper, fennel, dried ginger and other spices to grind into a fine powder, and sprinkle it evenly on the mustard greens. The amount of spices depends on personal taste, but it should not be too strong, so as not to take away the original taste of mustard greens.
Then seal the urn and let it sit in its original place. After ten days, the mustard greens have a salty aroma with various spices, moderate saltiness, and crisp and tender texture, before they are made.
The mustard made by this method is salty and crisp, can be accompanied by meals, and has a unique flavor. When making, every step needs to be meticulous. The amount of salt, drying, pressure, and placement are all related to the final taste of mustard.

Mercury is extremely toxic, and it needs to be stored and transported with caution.
When storing, choose the first heavy container. A solid and sealed container must be used to prevent the leakage of mercury. For example, a special thick-walled glass bottle with a tightly sealed plug is appropriate. And the material of the container should not be combined with mercury, otherwise it will be a disaster.
As for the storage place, it should be cool, dry, and well ventilated. Do not place it in direct sunlight, nor near fire and heat sources. Because mercury is easily vaporized into mercury vapor when heated, it is extremely toxic and will pervade the room, causing serious illness.
Furthermore, the storage environment of mercury is stress-resistant to vibration. Under vibration, the container may be damaged and the mercury will overflow, which will cause serious trouble.
During transportation, it is essential to pack tightly. In addition to a sturdy and sealed container, it is also necessary to wrap a buffer, such as thick cotton, soft bubbles, etc., to prevent bumps and collisions on the way and damage the container.
Transporters should also be familiar with the characteristics of mercury and emergency measures. Once there is a mercury leak, cover it with sulfur powder immediately to make it synthesize into mercury sulfide, which is greatly reduced in toxicity. And the interior of the transportation vehicle should be kept clean, and no debris can react with mercury.
The escort must also be rigorous and attentive, and always check whether the packaging is in good condition on the way, and must not slack off. If there is a slight mistake, the mercury poison will leak out, injure people and animals, and pollute water and soil, and the harm will be endless. Therefore, in the storage and transportation of mercury, everything is related to human life and the environment, and nothing should be sloppy.

The Ten Books of Sutra says: "Things are expensive and cheap, and the price varies from time to time." The price of caramel and lead acetate in the market is not constant, but changes with various conditions.
Caramel is made by fermenting grains, which has the ability to nourish and flavor, and has a wide range of uses. It is used in diet and medicine. The market price is related to the abundance of grains, the production cost, and the supply and demand. If the grain is ripe at the age, the grain is abundant, and the raw materials for making caramel are easy and cheap, the price of caramel may be easy; in the event of a famine, the grain harvest is poor, and the raw materials are rare, and the production requires labor and wages, the price will be high. If the demand for caramel increases sharply, and the demand exceeds the supply, the price should also rise; on the contrary, if the supply exceeds the demand, the price will drop.
As for lead acetate, it is a chemical product and has its own uses in industry, medicine and other fields. The change in its price is related to the difficulty of obtaining raw materials, the simplicity of the production process, and the urgency of market demand. If lead mining is smooth, auxiliary raw materials are also readily available, and the production process is refined, the cost is reduced, the price may be reduced; if lead ore is scarce, mining is difficult, production procedures are cumbersome, and the cost is high, the price will increase. If market demand is strong, the price will go up; if demand is low, the price will go down.
Overall, the prices of caramel and lead acetate in the market are not static. Businesspeople should consider the situation, observe the shortage of raw materials, the quality of craftsmanship, and the ups and downs of demand, so as to know the direction of prices and seek business profits. The market is impermanent, and only those who are clear and good can be invincible.