Diphenylamine-4-Sulfonic Acid Sodium Salt

Dinitrophenol is highly oxidizing and corrosive. Its activity is active, and it is often used as an oxidizing agent in chemical reactions. When it encounters flammable materials, it is easy to cause combustion, and even explosions, which are dangerous.
Sulfuric acid is also a strong acid. It is strongly corrosive and can erode many substances. In contact with water, it will cause a violent exothermic reaction. If you are not careful, droplets will splash, hurting people's skin, destroying people's clothing, and harming people. And its water absorption is strong, which can dehydrate and carbonize a variety of organic substances.
Copper is also a metal with good electrical conductivity, thermal conductivity and ductility. At room temperature, the chemical properties are relatively stable, but when encountering strong oxidants, such as nitric acid, concentrated sulfuric acid, etc., chemical reactions can also occur. In the air, long-term exposure, the surface can form patina.
Mercury, commonly known as mercury, is a liquid metal. Volatile, its vapor is highly toxic, inhaled into the human body, can damage the nervous system, kidneys and other organs. Mercury can dissolve many metals, form amalgams, and its chemical properties are relatively stable. Under normal conditions, it is not easy to react with common substances. However, when encountering strong oxidants, chemical changes will occur.
These substances have unique chemical properties. Although they are useful in industry, scientific research and other fields, when operating, you must be careful and follow procedures to prevent accidents and ensure personal and environmental safety.

Two immortals soup, Four Gentlemen soup, peony, gypsum, realgar, bile alum, etc., are all useful in various fields.
Two immortals soup, which originated from "Obstetrics and Gynecology", has the effect of warming kidney yang, tonifying kidney essence, diarrhea kidney fire, and regulating rushing. It is often used in menopausal syndrome, when the kidney yang and kidney yin are weak, and the virtual fire is disturbed, such as hot sweating, irritability, irregular menstruation, soreness of the waist and knees, etc. It is also quite effective in gynecological endocrine disorders.
Four Gentlemen Decoction, which is the basic prescription for replenishing qi, comes from "Taiping Huimin Hejiao Bureau Prescription". With ginseng, Atractylodes, Poria cocos, licorice four herbs into a prescription, good Qi invigorating spleen. Mostly used for the spleen and stomach qi deficiency syndrome, see the color withered white, low voice, shortness of breath fatigue, less food and loose stools, etc. For digestive system diseases, such as chronic gastritis, peptic ulcer belongs to the spleen and stomach qi deficiency, every application.
peony, divided into white peony and red peony. Baishao nourishes blood and regulates menstruation, converts yin and stops sweating, softens liver and relieves pain, and calms down liver and yang. It is often used for blood deficiency and yellowing, irregular menstruation, spontaneous sweating and night sweats, pain in the ribs and abdomen, and headache and dizziness caused by excessive liver and yang. Red peony clears heat and cools blood, dissipates blood stasis and relieves pain. It can be used for warming poisonous hair spots, vomiting blood, red eyes, swelling and pain, liver depression and hypochondria, menstrual closure and dysmenorrhea, abdominal pain, bruises and other diseases.
Gypsum, which is cold in nature, clears heat and purges fire, removes boredom and quenches thirst, calcined gypsum can also be used externally to reduce dampness and astringent sores, produce muscles and stop bleeding. Internal use is mostly used for heat sickness, strong heat, irritable thirst, sweating, strong veins, etc. It is also used for pulmonary heat, asthma and cough, stomach fire and toothache, headache, etc. External use to treat ulcers that do not converge,
Realgar, detoxification and insecticide, desiccant and damp expectoration, malaria removal, external use to treat carbuncle and boils, snake and insect bites, and internal administration can treat insect abdominal pain, seizures, and malaria. However, it is poisonous, and it should be taken internally with caution.
Gallalum, spitting saliva, detoxifying and dampening, removing corrosive sores. For wind and phlegm congestion, laryngeal paralysis, epilepsy, accidental ingestion of poisons, external use to treat mouth sores, chancre, pterygium, sores, etc. It is also poisonous, so be careful when using it.

There are various ancient methods for making Erxian ointment - 4 - showing acid + lead + alum.
To make Erxian ointment containing acid, lead, and alum, there are various methods. Now I will tell you in detail.
First, you can take pure alum first, crush it into fine powder, place it in a crucible, and slowly bake it over a slow fire. When the water vapor of the alum is gone, the texture is crisp, and the color turns white, then stop. Take another lead block, melt it in the furnace, turn it into a liquid, pour it into cold water, and stimulate it into chips. Then the baked alum powder and lead shavings are placed in a stone mortar in an appropriate proportion, and pounded evenly. Then take the acid, add it slowly, and stir while adding, so that the three are fully integrated. Then, a fine sieve is used to remove the coarse grains. The resulting material is the initial material.
Second, melt the lead into a liquid first, and pour it into a container containing alum water while it is hot. The alum water needs to be dissolved in an appropriate amount of water in advance. When stirring, a wonderful transformation can be seen. When the reaction stops for a while, let it stand to settle, pour out the supernatant, and leave the sediment. This sediment is mixed with an appropriate amount of acid, and placed in an iron pot. Boil slowly over low heat. When boiling, keep stirring until it is as thick as a paste, and then make it.
Third, grind the acid and alum into a very fine powder and mix well. Then make lead powder, and place it in a crock with the mixture of the former two. Seal the mouth of the can and heat it alternately with civil and military fire. At first, bake it with a warm fire, so that the contents of the can are slowly heated and fused, and then gradually increase the firepower and calcine it for a certain period of time. When the heat is sufficient, take it out after cooling, and grind it for later use. These three methods of preparation each have their own delicacies, and can be carefully selected according to the actual needs and the characteristics of the materials.

The storage conditions of dinitrophenol, 4-hydroxybenzoic acid, copper, and mercury are crucial to the storage and protection of their substances. According to Tiangong Kaiwu, the properties of various substances should be carefully considered before a proper method can be obtained.
Nitrophenol is toxic and active. It should be stored in a cool, dry, and well-ventilated place, away from fires and heat sources. Because of its flammability, contact with oxidants can easily cause violent reactions, so it must be stored separately from oxidants, reducing agents, acids, and bases, and should not be mixed. And suitable materials should be prepared to contain leaks to prevent accidental leakage and harm.
4-Hydroxybenzoic acid has relatively high stability, but it should also be placed in a dry and dark place. Although it does not have extremely dangerous characteristics, it may also affect its quality if it is exposed to moisture or light for too long. It should be packed in a sealed container to avoid excessive contact with air to prevent oxidation and other reactions from causing it to deteriorate.
Copper and mercury are also metals. Copper is tough and prone to patina in case of humid air. Therefore, the storage of copper should be in a dry environment, and it can be coated with protective paint to prevent it from contacting with water vapor. Mercury is liquid at room temperature and volatile, and its vapor is highly toxic. When stored in a strong, sealed container, keep it in a cool and well-ventilated place. If it is accidentally spilled, it must be immediately covered with sulfur powder to make it synthesize into mercury sulfide to reduce its harm.
To properly store dinitrophenol, 4-hydroxybenzoic acid, copper and mercury, it is necessary to observe appropriate conditions according to their respective characteristics to ensure their quality and prevent their harm.

In today's market, the erhu, serpent, flute, and chime are all different due to the quality of materials, workmanship, and brand.
If the erhu is made of ordinary materials, it may be more than 100 ears. If the husband uses high-quality python skin and wood, and it is made by a famous craftsman, its quality can reach thousands, or even more. Because of the acquisition of good materials, the craftsman's skills are exquisite, so it is sturdy.
The tools of thunder are complex, and they need fine materials, and the workmanship is exquisite. If the ancient and original, the material art and craftsmanship are ingenious, and the history and culture are both exquisite, the quality will be high, or the best.
For the average bamboo, one or two hundred can be obtained. However, if the bamboo is well-made, such as Xiangfei Bamboo, and the carving is perfect, and the tone is clear, the quality can also reach 100 or even 1000. If it is made by a famous artist, it contains a special style, and the value is even more immeasurable.
For those who use stone materials, it depends on the quality, fineness and carving of the stone. Ordinary stone, or 100. If it is made of famous stone, and the carving is exquisite, and there is an ancient elegance, its quality can climb to 1000.
In this case, the market size of this kind of equipment is large, and the person who does it depends on his own needs, preferences, and strength, and adds more than one person, in order to obtain the equipment of the heart.