Shanghai Yearn Chemical Science-Tech Co., Ltd-pvp series products China manufacturers. We are a leading chemical supplier in Asia with more than 20 years of industry experience, focusing on pharmaceutical ingredients, agrochemicals, textile systems, fungicides, water treatment and food additives.After a long period of solid development, we have our own factory in Zhejiang, producing PVP series and PVPP, and in recent years, our PVP production has tripled.With stable production, young and diversified team, professional technical support, our high-quality products have been supplied to more than 20 countries.Main products NMP, PVPK series, PVI/PVP, PVPVA64, PVP/PVI copolymer, PVPP and other chemical raw materials, with strict quality of products, continuous technological innovation, improvement and quality service, we have a very good reputation among customers.In terms of PVP, we mainly produce K30.K60,K90, industrial grade, cosmetic grade, pharmaceutical grade. We are committed to providing quality PVP series products to customers all over the world.For food additives,…

As a crosslinked polymer of PVP, PVPP inherits the excellent performance of PVP which is widely used in medicine and other fields. Through the cross-linking reaction, PVPP molecules are insoluble, ensuring that they can be completely removed after performing their role in removing turbidity, maintaining the purity of the product.

Anhydrous lithium hydroxide (CAS: 1310-65-2) is an important inorganic compound, widely used in ceramics, glass, lithium batteries and other fields. In this paper, its chemical properties, preparation methods, application fields and future development trends are discussed in detail.First, chemical propertiesAnhydrous lithium hydroxide is a white crystalline powder that is strongly alkaline and easily soluble in water, but insoluble in ethanol and ether. Its chemical formula is LiOH and its molecular weight is 23.95. In the air, anhydrous lithium hydroxide easily absorbs carbon dioxide and water, forming lithium carbonate and water. Therefore, in the process of storage and use, sealing measures need to be taken to prevent its moisture absorption and deterioration.2. Preparation methodThere are two main preparation methods for anhydrous lithium hydroxide: melting method and precipitation method.1. Melting method: lithium carbonate and lithium hydroxide are mixed in a certain proportion, melted at high temperature and hydrogen is injected into the…

In the field of chemistry, lithium hydroxide (CAS: 1310-66-3) is an important inorganic compound, widely used in batteries, ceramics, glass and other fields. In this paper, the properties, preparation methods, application fields and future development prospects of monohydrate lithium hydroxide are discussed.Chemical name: Lithium hydroxide monohydrateCAS:1310-66-3Molecular formula :LiOH·H2O Test Items Parameters LiOH ≥56.5% Na+K ≤0.02 % Ca ≤0.025 % Fe ≤0.0015 % CO3 2- ≤0.7 % SO4 2- ≤0.02 % Cl– ≤0.015 % HCI insoluble ≤0.005 % Water insoluble ≤0.01 % First, the properties of single-water lithium hydroxideLithium hydroxide monohydrate, with the chemical formula LiOH·H₂O, is a white crystalline powder. It is soluble in water and slightly soluble in ethanol and ether. Single-water lithium hydroxide has a higher melting point, about 450°C. In the air, single-water lithium hydroxide will absorb carbon dioxide and gradually change to lithium carbonate. In addition, it is strongly alkaline and corrosive, so extra care should be taken when using and storing it.Second, the preparation method of single-water lithium…

Polyvinylpyrrolidone (PVP) is extremely soluble and can be dissolved in a variety of solvents. Specifically, PVP is soluble in water, chlorine-containing solvents, ethanol, amines, nitroalkanes, and low molecular fat acids. In addition, it has a good compatibility with most inorganic salts and a variety of resins. However, PVP is insoluble in a few solvents such as acetone and ether. This extensive solubility and compatibility gives PVP a unique advantage in a variety of applications. 12 Water solubility: PVP is highly soluble in water, which is one of its most important solubility properties.Organic solvent solubility: In addition to water, PVP can also be dissolved in halogenated hydrocarbon solvents, alcohols, amines, nitroalkanes and low molecular fatty acids and other organic solvents.Insoluble: In contrast, PVP is insoluble in a few solvents such as acetone, ether, turpentine, aliphatic hydrocarbons and alicyclic hydrocarbons.These physical and chemical properties make PVYrrolidone widely used in many fields such…

pvp-polyvinylpyrrolidone function Polyvinylpyrrolidone (PVP) is an important fine chemical product with excellent performance and high added value. Its molecules contain more polar lactam groups and have the ability of polophilic groups. It is soluble in water and alcohol, carboxylic acid, alkanol, halogenated hydrocarbons and other polar organic solvents. PVP can be formed in water, methanol, ethanol, chloroform or dichloroethane, and the film formed is colorless, transparent, hard and bright.PVP has strong hygroscopicity and good compatibility with polyethylene, polypropylene, polyvinyl chloride, polyvinyl alcohol, shellac and dextrin. Polyvinylpyrrolidone is a binder, emulsifier stabilizer and film forming agent.The function of polyvinylpyrrolidonePolyvinylpyrrolidone (PVP) is a versatile chemical that, according to the Cosmetics Database and CosmeticsInfo.org, acts as a binder, emulsifying stabilizer, suspension, and hair styling in cosmetics and beauty products, primarily in mascara, eyeliner, conditioner, hair gel, shampoo, and other hair care products. It prevents the separation of water and oil in the emulsion…

Crosslinked POvidone, also known as insoluble polyvinylpyrrolidone (PVPP), is insoluble in water and common reagents. It is a super disintegrator in tablets and is used to disintegrate tablets and improve the release rate of active ingredients in tablets, capsules and pills. Insoluble polyvinylpyrrolidone is used as a swelling polymer in the pharmaceutical industry, which has a wide range of applications, because they have a decomposition effect on tablets, can hydrophilize various insoluble drugs, can stabilize various suspension agents, and have the ability to form complexes, as well as adsorption, etc., can be used as pharmaceutical additives. Application of pharmaceutical cascade crosslinked POvidone Used as a disintegrating agent Crosslinked POvidone is one of the excellent new excipients developed in recent years. Because of its strong water absorption and expansion and excellent disintegration performance, it is called the three super disintegrators with crosslinked carboxymethyl cellulose sodium and crosslinked carboxymethyl starch sodium. The…

PVP has good bonding properties and strong dissolution ability. PVP formed tablets, after taking in the digestive tract, the first rapid dissolution, is the local expansion and disintegration of the tablets, the release of drug fragments, and then accelerate the dissolution and absorption of the drug, play a rapid role in the efficacy of the drug. PVP is soluble in water and most organic solvents, which is particularly important for drugs with few solvents to choose from. It is for these reasons that PVP has been widely used in pharmaceutical tablets, especially abroad. Polyvinylpyrrolidone (PVP) is a kind of synthetic polymer material with many unique properties and uses. In this paper, the application fields and properties of polyvinylpyrrolidone will be introduced in detail. The application of polyvinylpyrrolidone in the pharmaceutical industry has excellent solubility, biocompatibility and chemical stability, so it has a wide range of applications in the pharmaceutical field.…

SummaryWe studied the influence of an adsorbent PVI-PVP resin (a copolymer of vinylimidazole and vinylpyrro-lidone), on the removal of heavy metals in wines, main-ly copper (Cu), iron (Fe), lead (Pb), cadmium (Cd) and aluminium (AI). The study also ipvestigated the influ-ence of PVI-PVP on the physical-chemical and sensory characteristics of white and red wines, comparing its effect when applied in the must and in the wine. The removal of metals was more effective when PVI-PVP was applied to the wine than to the must. The removal of Fe and Pb was more effective in white wines than in red wines, while the removal of Cu and Al was higher in red wines. In general, the higher the PVI-PVP dose,the greater the quantity of metallic elements (copper,iron, lead and aluminium) that are removed.PVI-PVP had a minor effect on phenolie composition. The wines showed some decrease in total acidity and an increase…

1. Basic introduction of DMSODimethyl sulfoxide (DMSO) is a highly efficient organic solvent known for its unique chemical properties and a wide range of laboratory applications. As a polar aprotic solvent, DMSO has excellent solubility and can dissolve a variety of organic and inorganic substances, including many insoluble biological macromolecules.In the field of biomedical research, DMSO is not only a common carrier of drugs and compounds, but also plays an important role in key experimental operations such as cell freezing and gene expression.Its popularity and versatility make it an indispensable tool in the laboratory. This article will delve into the scientific application and operation of DMSO to help researchers make more effective use of this “laboratory gold oil”.Second, the application of DMSOThe reason why DMSO is widely used, first of all, thanks to its excellent chemical stability and excellent solubility, can dissolve a variety of biological macromolecules and small molecules…