3,4-DIAMINOTHIOPHENE DIHYDROBROMIDE

3,4-Dihydroxybenzoic acid dihydrate, which is a chemical substance. Its main use is quite extensive, in the field of medicine, it can be used as a key intermediate in drug synthesis. Due to its specific chemical structure and properties, it can participate in the construction of many drug molecules, helping to develop drugs with specific curative effects, such as some anti-inflammatory and antibacterial drugs.
In the field of materials science, it can be used to prepare materials with special properties. For example, by reacting with other substances, it can be used to construct materials with specific adsorption, stability or optical properties, which are useful in sensors, catalyst carriers, etc.
In the cosmetics industry, because it may have certain antioxidant properties, it may be used in cosmetic formulations to help protect the skin from free radical damage and delay skin aging.
In terms of scientific research and exploration, as a basic chemical substance, it can provide basic raw materials for the research of organic synthetic chemistry, material chemistry and other fields, and help scientists to deeply explore scientific issues such as chemical reaction mechanism and material performance regulation, and promote the continuous development of related disciplines.

The purity requirement of 3% 2C4-dihydroxyphthalic acid dihydrate is generally speaking, the purity of its high-purity product can reach more than 98%. This purity standard is critical in many fields, such as chemical synthesis, pharmaceutical research and development, etc.
In chemical synthesis, high-purity 3% 2C4-dihydroxyphthalic acid dihydrate can ensure the accurate reaction, reduce the side reactions caused by impurities, and then improve the quality and yield of the product. In the field of pharmaceutical research and development, as a key intermediate, its high purity is also related to the safety and effectiveness of the drug. If there are too many impurities, it may interfere with the pharmacological activity of the drug, and even introduce unknown risks.
To achieve this purity standard, multiple fine purification methods are often required. Initially, crystallization can be used, and most of the impurities can be initially removed after multiple recrystallization according to the difference in solubility in different solvents. Then column chromatography can be supplemented to achieve further separation and purification by the different forces of different substances and stationary phases. In the process, it is necessary to carefully control the conditions of each link, such as temperature, solvent ratio, flow rate, etc., to obtain products that meet high purity requirements. In this way, 3% 2C4-dihydroxyphthalate dihydrate can be properly applied in various fields and play its due role.

3,4-Dihydroxyphthalic anhydride has been synthesized in many ways throughout the ages.
First, 3,4-dihydroxyphenylethanol can be used as the starting material. First, a suitable oxidizing agent, such as manganese dioxide-sulfuric acid system, is carefully oxidized to obtain 3,4-dihydroxyacetophenone. Then, the acetophenone is brominated with bromine in a suitable solvent, such as glacial acetic acid, and bromine atoms are introduced. Then it is treated with a strong base, such as sodium hydroxide alcohol solution, to make it eliminate and form an unsaturated carbonyl compound. Subsequently, it is hydrolyzed and acidified to obtain 3,4-dihydroxyphthalic acid. Finally, in the presence of a dehydrating agent, such as acetic anhydride, the dehydration is heated to obtain 3,4-dihydroxyphthalic anhydride.
Second, catechol is used as the starting material. First, it undergoes a Fu-gram acylation reaction with chloroacetyl chloride under the catalysis of anhydrous aluminum trichloride to obtain 3,4-dihydroxyphenylacetyl chloride. This product is hydrolyzed to produce 3,4-dihydroxyphenylacetic acid. After that, a strong oxidizing agent, such as potassium permanganate, is oxidized under suitable conditions to obtain 3,4-dihydroxyphthalic acid. The same method, through the action of a dehydrating agent, dehydrates to form anhydride.
Third, 3,4-dihydroxybenzoic acid can also be used as a raw material. It is first esterified to obtain 3,4-dihydroxybenzoate. Reduced by sodium-ethanol system, 3,4-dihydroxybenzyl alcohol can be obtained. Then through oxidation, bromination, elimination, hydrolysis, acidification and other steps, 3,4-dihydroxybenzoic acid is prepared, and finally dehydrated to anhydride.
These several synthesis methods have their own advantages and disadvantages. It is necessary to choose carefully according to the actual situation, such as the availability of raw materials, cost, difficulty of reaction conditions, etc., to achieve the purpose of efficient synthesis.

3,4-Dihydroxyphthalic acid dihydrate is a chemical substance. Its storage conditions are crucial, which is related to the stability and quality of this substance.
According to the meaning of "Tiangong Kaiwu", all substances have their own suitable methods of storage. This 3,4-dihydroxyphthalic acid dihydrate should be stored in a cool, dry and well-ventilated place. A cool environment can prevent its properties from changing due to excessive temperature. If it is placed in a warm place, it may cause chemical reactions and damage its purity.
Dry conditions are also indispensable. Because of its hydrate state, if the environment is humid, it may cause additional hydration reactions or change the crystal structure. And good ventilation allows the gas in the storage space to flow smoothly without accumulating harmful gases, which affects the properties of this substance.
Furthermore, the storage place should be kept away from fire sources and oxidants. This chemical may have a certain chemical activity, and it may react violently when exposed to fire or oxidants, which may pose a safety risk. When storing, it should also be placed separately from other chemicals to prevent interaction and unpredictable consequences.
In addition, the choice of storage containers is also important. It is advisable to use containers with good sealing performance, such as glass bottles or plastic bottles of specific materials, to ensure that the impact of the external environment on them is minimized and to maintain the original properties of 3,4-dihydroxybenzoic acid dihydrate for subsequent experiments, production, and other purposes.

I think what you are asking is about the price range of 3,4-dihydroxyphenylglyoxal dihydrate in the market. However, the price of this substance often changes due to many factors, and it is difficult to determine its fixed number.
First, the price varies depending on the manufacturer. Large factories may have higher prices due to their fine craftsmanship and quality; small factories are competing for the market, or the price is slightly lower. Second, the purchase volume is also the key. If the purchase quantity is large, merchants often give discounts, and the unit price may drop; if the purchase quantity is small, the unit price may be high. Third, the state of market supply and demand also affects its price. If you need more, you need less, and the price may be higher; if you need more, you need less, and the price may be lower.
As far as I know, in the current market, if this substance is of ordinary purity and purchased in small quantities, the price per gram may be around tens to hundreds of yuan. If purchased in large quantities, the price per gram may drop to a few to tens of yuan. However, this is only a rough estimate, not an exact number. And the market changes, and the price changes at any time. For the exact price, you can consult chemical product suppliers, reagent sellers, or check on relevant chemical trading platforms to get an accurate price.