1,3-thiazole-5-carboxylate

"Tiangong Kaiwu" contains that those who are mirabilite, that is, simple mirabilite, are drizzled with water, clarified, and then halved by refining, poured into a wooden basin, and settled into white snow. Its quality is extremely fine, and if it is blown by the wind and the sun, it will become powder, drizzled with burning wood ash, and then clarified. The main use of mirabilite is first in medicine. In the study of traditional Chinese medicine, mirabilite has a salty, bitter, cold taste, and returns to the stomach and large intestine. It has the effect of laxative under diarrhea, soft and firm dryness, clearing fire and reducing swelling. It is often used for solid heat stagnation, abdominal fullness and pain, stool dryness and colon, intestinal carbuncle swelling and pain; external use can treat breast carbuncle, hemorrhoids swelling and pain. In case of stool dryness, mirabilite and rhubarb are compatible, which can reduce heat condensation and make solid heat stagnation come out of the stool.
Secondly, it is also widely used in industry. In glass manufacturing, mirabilite can be used as a flux to reduce the melting point of glass raw materials, promote the melting and clarification of glass raw materials, and improve the quality and production efficiency of glass. In ceramic production, it can improve the properties of ceramic bodies and glazes, making the ceramic surface smoother and more uniform in color. In the printing and dyeing industry, mirabilite can be used as a dye promoter, which helps the dye to better adhere to the fabric and improve the dyeing effect.
Furthermore, in the leather industry, mirabilite is used in the hair removal and softening process of leather. It can loosen the hair follicles of leather, facilitate hair removal, and at the same time soften the leather fibers to a moderate extent, enhancing the flexibility and durability of leather, thereby improving the quality of leather products.

1% 2C3 (suspected to be serial numbers 1 and 3, it is assumed here that it refers to sodium bicarbonate) - soda ash - 5 - The physical and chemical properties of citric acid are as follows:
###Sodium bicarbonate (soda ash is not sodium bicarbonate, soda ash is sodium carbonate, here treated as sodium bicarbonate)
1. ** Physical properties **: Sodium bicarbonate is a white crystalline powder, odorless, taste alkali, and slowly decomposes in humid air. Its density is 2.159 g/cm ³, soluble in water, with low solubility in water, and the aqueous solution is weakly alkaline. It gradually decomposes to form sodium carbonate, carbon dioxide and water above 50 ° C, and completely decomposes at 270 ° C.
2. ** Chemical properties **: Sodium bicarbonate can react violently with acids to generate corresponding salts, water and carbon dioxide. For example, with hydrochloric acid: $NaHCO_ {3} + HCl = NaCl + H_ {2} O + CO_ {2}\ uparrow $. At the same time, as an acid salt, it can also react with bases, such as with sodium hydroxide: $NaHCO_ {3} + NaOH = Na_ {2} CO_ {3} + H_ {2} O $.
###citric acid
1. ** Physical properties **: Citric acid is usually colorless translucent crystal or white particles or white crystalline powder, odorless, taste extremely acid. It is slightly deliquescent in humid air, its density is about 1.542g/cm ³, melting point 153 ℃ (water loss). It is easily soluble in water and ethanol, and its aqueous solution has strong acidity.
2. ** Chemical properties **: Citric acid has hydroxyl and carboxylic groups, and has the general properties of carboxylic acids. It can undergo esterification reactions, such as generating triethyl citrate with ethanol under the catalysis of concentrated sulfuric acid. At the same time, because there are multiple carboxylic groups in the molecule, it can undergo neutralization reactions with bases, such as reacting with sodium hydroxide to generate sodium citrate and water. In addition, citric acid has reducing properties and can be oxidized under some specific conditions.

If you want to make arsenic, you need to understand the reason. Arsenic, that is, arsenic trioxide, is a highly toxic substance. Its preparation method is dangerous, and in today's day and age, the preparation of this substance involves many violations, so it should be avoided. However, since it is said in ancient Chinese, the right is based on ancient knowledge.
The ancient preparation method is mostly from arsenic-containing minerals. Arsenic stone is often taken, which is mixed in color, or white or yellow or red. First, smash the arsenic stone and place it in a special crucible. The crucible is made of refractory materials, such as clay, with thick and strong walls, which can withstand high temperatures.
Then it is placed on the stove and burned with charcoal fire. When burning, the firepower should be uniform and strong, the charcoal fire should be red, and the heat wave should be rolling. When the arsenic stone is heated, the arsenide in it will gradually melt and turn into smoke rising. Covered with a condensing vessel, such as a copper cover, it conducts heat well. When the smoke is cold, it condenses on the wall of the cover, which is arsenic.
During this process, the smoke is highly toxic, and if you are not careful, inhalation will endanger your life. And the prepared arsenic, if it is not used for specific and legal purposes such as medicine, it is a great harm to hold and prepare it privately. Although the ancients knew the law, they should use it with caution. At present, they should be more careful to follow the law, and they must not involve this risk, so as not to harm themselves and others.

1% 2C3 (suspected to be 1, 3), that is, saltpeter, sulfur, mixed with charcoal can be made into gunpowder, which is a great invention in ancient China. Gunpowder is used in many fields.
In the military field, the appearance of gunpowder revolutionized the mode of warfare. In the past, wars depended on close combat with cold weapons. Gunpowder was used for weapons, such as fireballs, artillery and other firearms. Fireballs can be ejected into enemy formations, injuring the enemy with their explosive power; artillery is more powerful and destructive, capable of crashing down city walls at long distances, severely damaging enemy troops, greatly improving the combat effectiveness and combat range of the army, and having a profound impact on the outcome of wars.
In the engineering field, gunpowder is also very useful. When opening a mountain and opening a road, gunpowder is placed at a suitable place in the rock. After ignition, the force of explosion can break the rock and greatly speed up the progress of the project. For example, building plank roads, digging tunnels and other projects, gunpowder plays a key role in reducing the difficulty and time cost of manual excavation.
In the entertainment field, gunpowder is made into fireworks. At festivals, fireworks bloom in the night sky, colorful and colorful. The principle is to add different metal salts to gunpowder, which produces flames of different colors when burned, bringing a visual feast to the people, adding a festive atmosphere, and becoming an indispensable part of traditional celebrations.
As for 5-carboxylic anhydride, this is a class of organic compounds, which are widely used in chemical, pharmaceutical and other fields. In chemical synthesis, it is often used as an acylating reagent to participate in many organic reactions, used to prepare esters, amides and other compounds, and is an important raw material for building complex organic molecular structures. In the pharmaceutical industry, carboxylic anhydride can be used as an intermediate to participate in the synthesis of active pharmaceutical ingredients, helping to develop a variety of drugs for treating diseases, and making great contributions to human health.

In modern times, the genus of cane sugar, spices, and cotton cloth, the market conditions are unpredictable, and it is related to people's livelihood and commerce. Here is the prospect of the spice market.
Spices are always treasures in the world and are of great use in various fields. Their taste is pleasing to the nose, used for incense, can create elegance and peace of mind; in meals, they can add flavor and turn bland into delicacies. In the ancient trade, spices were of high value, and caravans traveled thousands of miles to pursue their profits.
Looking at the spice market today, the prospects are quite promising. First, the world's life is getting richer, and the demand for quality of life is increasing day by day. The demand for spices in home incense and personal fragrance is increasing. Aromatherapy products can help relieve stress and improve sleep. For the fast-paced world, it is very important, and the market scale has expanded year by year.
Second, the catering industry is booming, and the demand for spices is also rising. Cuisine from all over the world competes with each other, all relying on spices to add flavor and flavor. New cuisines are constantly being introduced, and the use of spices is more subtle, driving the demand for spices to continue to rise.
However, there are also challenges in the spice market. First, the quality of spices is uneven. The origin, planting methods, and processing techniques are different, resulting in a huge disparity in the quality of spices. Bad merchants are the best, disrupting market order and affecting consumer trust. Second, the supply of raw materials may fluctuate. Factors such as abnormal climate and geopolitics can reduce the production or transportation of fragrance raw materials, affecting market stability.
Although there are challenges, the fragrance market has a bright future. Over time, with improved supervision and advanced planting and processing technologies, the fragrance market should be able to develop steadily and bring huge benefits to all parties.