Research backgroundCopper (Cu) is a metal ion commonly found in all wines, with concentrations usually less than 0.5 mg/L. Copper in wine may come from viticulture, including application of fungicides and absorption from the soil, or during wine production (including contamination and additions caused by winemakers). In fact, copper is often deliberately added to wine to suppress reducing odors, such as those caused by hydrogen sulfide, by forming non-volatile complexes with these adverse aroma compounds. Excess hydrogen sulfide can make the copper in wine form copper organic acid complex, this form of copper can ensure that the wine is not affected by the accumulation of hydrogen sulfide in the short term. For copper sulfide complexes left over from wine production, subsequent filtration (0.45μm or 0.20μm) often fails to remove them. Finally, excess copper in wine can cause copper fog, but this usually requires a much higher concentration of copper than…

2-methyl-1, 3-propylene glycol (English name: 2-methylpropane-1,3-diol, abbreviated as MPO, CAS number: 2163-42-0) The chemical name of methylpropylene glycol is 2-methyl-1, 3-propylene glycol, abbreviated MP0, and 1, 3-butanediol is an isomer. Methylpropylene glycol is a colorless, transparent liquid with low melting point and low viscosity. MPO/ methylpropylene glycol Performance index Performance specifications 200kg in drums MPO can be used for polyester resin and its coating and plasticizer, ink moisturizer, food flexible packaging compound polyurethane adhesive. Performance application 1, used in polyester resin, paint and other industries. 2, used in plastic additives, pesticides, fungicides. 3, used in detergent solvent, moisturizer, emulsifier, skin care agent. Security risk MPO is mildly toxic, irritating to eyes and skin contact, with acute skin LD50 > 2000 mg/kg in rabbits [5]. The 2018 Announcement of New Varieties of Food Related Products specifies a specific migration limit of 5mg/kg when MPO is used in coatings and coatings for…

The unknown face of DMSOFirst, participate in hydroxyl oxidation reactionTwo well-known oxidation reactions involving DMSO are swern oxidation and Pfitzner-Moffatt oxidation, both of which are used to oxidize alcohols to aldehydes or ketones. Among them, the oxidation of swern in partnership with oxaloyl chloride usually reacts in methylene chloride at -78 ° C to avoid the risk of explosion (DOI:10.1021/jo00882a030). Pfitzner-Moffatt oxidation, on the other hand, uses DCC of more than 3 equivalent and strong acidic conditions to activate DMSO to achieve oxidation (DOI:10.1021/ja00952a026).Second, cooperate with iodine oxidation rearrangementIn 2023, Professor Jiao Ning’s research group at Peking University reported a new iodine-catalyzed oxidative rearrangement of DMSO and cyclobutenones, which successfully completed the construction of a series of furan-2 (5H) -ketone molecules. In this reaction, iodine was used as catalyst in MeNO2 reaction solvent, the reaction temperature was 100℃, and finally the product yield was 84%. Nitromethane itself is more dangerous,…

1,2 pentadiol, the main role in cosmetics is humectant, antibacterial agent, solubilizer, emollient. 1, 2-pentanediol, chemical formula C5H12O2, is a diol with refreshing and excellent antibacterial properties, and alkanediol, a polyol with high antibacterial properties. It is an important intermediate of bactericide propiconazole and a key raw material for the synthesis of bactericide propiconazole.1,2 pentadiol is a multi-functional, high stability, widely used in cosmetics raw material ingredients, the main role in cosmetics is moisturizer, antibacterial agent, solvent, emollient, used in skin care lotion, skin care cream, eye cream, moisturizer, shampoo and other products, but also the production of polyester fiber, surfactants, medicine and other important raw materials. It has no odor, high safety and good skin feeling, especially suitable for sensitive skin. Moisturizing: 1,2 pentadiol is an excellent humectant with very high moisture absorption and water retention, so it is commonly used as a humectant in cosmetics. Because pentadiol has…

When it comes to dimethyl sulfoxide, also known as DMSO, we think of cell cryopreservation.The cell freeze of 6:3:1 is familiar to every scientific researcher who has done cell culture.DMSO, a natural compound derived from trees, was first discovered as a result of paper making.Papermakers found that after the bark was crushed and homogenized, a colorless and slightly yellowish liquid oozed out, which has the function of pain relief and rapid wound healing.Many workers, accidentally working, get a cut on their hand, and use this liquid to relieve pain and reduce swelling.The news spread quickly.For a time, “Luoyang paper expensive”, this light, sticky liquid, its value far exceeds the paper.How much money does it take to sell paper? Selling this stuff for money is cool.Huge profits, the mystery of the veil, but also lured many scientists into a huge effort to study.Subsequently, the DMSO structure was identified, containing two hydrophobic…

01 1, 2-pentanediol introduction1, 2-pentanediol, chemical formula C5H12O2, is a diol with refreshing and excellent antibacterial properties, and alkanediol, a polyol with high antibacterial properties. It is an important intermediate of bactericide propiconazole and a key raw material for the synthesis of bactericide propiconazole.1,2 pentadiol is a multi-functional, high stability, widely used in cosmetics raw material ingredients, the main role in cosmetics is moisturizer, antibacterial agent, solvent, emollient, used in skin care lotion, skin care cream, eye cream, moisturizer, shampoo and other products, but also the production of polyester fiber, surfactants, medicine and other important raw materials. It has no odor, high safety and good skin feeling, especially suitable for sensitive skin.Moisturizing:1,2 pentadiol is an excellent humectant with very high moisture absorption and water retention, so it is commonly used as a humectant in cosmetics.Because pentadiol has a certain hygroscopic property, it can absorb moisture in the air, thus playing…

Chemical name: 1, 2-hexadiolMolecular formula: C6H14O21, 2-hexadiol is a very safe and effective humectant with a wide range of antibacterial and preservative properties.1, 2-hexadiol is a kind of polyol, the appearance is colorless and transparent, as a cosmetic raw material, has a good bactericidal and moisturizing effect (antibacterial mechanism: it can enter the cell membrane of microorganisms, and then destroy the integrity of the cell membrane, so that the cell fluid penetrates out, and finally leads to the death of microorganisms), and has no sensitive side effects on human skin. 1, 2-hexadiol has good miscibility with other substances (easily soluble in water, ethanol, etc.), and can be well combined with other anti-microbial substances to play an antibacterial and anti-sensitive role. In addition, there are also reports that 1, 2-hexanediol is used in deodorant, which has obvious deodorizing and antiperspirant effect on human skin, and is gentle to the skin.Antiseptic effect…

First, the role of glacial acetic acid in textile dyeing1, in the dyeing process, glacial acetic acid can play a role in fixing the dye. During the dyeing process, the dye needs to chemically react with the fiber molecules in order to firmly adhere to the fiber. Glacial acetic acid, as a neutralizer, can adjust the pH value between the dye and the fiber, so that it is in the best reaction conditions.2, glacial acetic acid can also form a stable complex with dyes, increasing the binding force of dye molecules and fiber molecules, thereby improving the firmness and durability of dyeing.3. In textile finishing, adding an appropriate amount of glacial acetic acid can form more ester bonds between fiber molecules, thereby improving the wrinkle resistance and washable resistance of textiles.2. Application cases of glacial acetic acid in textile printing and dyeing industry1. Cotton dyeingIn the process of cotton dyeing,…

Shanghai Yearn Chemical Science-Tech Co., Ltd One-stop chemical raw material supplier in china. Shanghai Yearn Chemical Science-Tech Co., Ltd it is a comprehensive import and export trading company dealing in chemical raw materials. The main body of the company was established in Hong Kong in 2019, and then transferred the strategic center to Shanghai, covering Jiangsu, Zhejiang, Shanghai and Anhui regions. The main sales of NMP, PVP K30, anhydrous lithium hydroxide, DMSO, mosquito repellent, lithium iron phosphate, PVPP, lithium hydroxide, lithium carbonate, glacial acetic acid, barium metaborate and other chemical raw materials products, with strict quality products, continuous technological innovation, improvement and quality service, Not only for Shanghai, Jiangsu, Zhejiang, Shandong and other regions of the enterprise to provide high-quality products, but also has the right to import and export exported to Southeast Asia, New Zealand, Australia, Germany and other countries and regions. The company is deeply engaged in the…

General description Dimethyl sulfoxide (DMSO) is an effective aprotic solvent, colorless, odorless, and naturally hygroscopic. DMSO can enhance the permeability of various hydrophilic and lipophilic permeants. It is one of the most widely used laboratory solvents. Apply Dimethyl sulfoxide (DMSO) is used as a compound detection tool in various experimental studies. In the amyloid beta beta aggregation experimental protocol, it can be used as a solvent to redissolve the polypeptide to maintain its dissociated state. Look out Products that are prone to excessive cooling and slowly melt and solidify at room temperature can be liquefied again at room temperature without affecting themselves. Other instructionsDimethyl sulfoxide standardDimethyl sulfoxide (DO) is an organic compound that is often used as a solvent, reaction reagent and catalyst carrier. Due to its chemical properties, it may be regulated as a laboratory reagent. Here are some possible relevant standards for DMSO:1. Purity standards: DMSO used in…