Polyvinylpyrrolidone… (referred to as PVP)… It is a kind of synthetic polymer with a wide range of uses. It has important applications in medicine, cosmetics, food, industry and scientific research. As an important functional polymer, the quality standard of PVP is crucial to ensure its application in various fields.The quality standard of PVP should include the requirements of its chemical properties, physical properties, biocompatibility, solubility, viscosity and so on. In terms of chemical properties,PVP content, monomer residue, acidity, alkalinity and other indicators need to meet the requirements of national standards or industry standards. In terms of physical properties, the appearance, granularity, melting point, glass transition temperature and other indicators of PVP also need to meet the provisions of the corresponding standards. In addition, as a polymer material with good biocompatibility, the biocompatibility test of PVP is also one of the important contents of the quality standard. In addition, the solubility…

Product name: PVP/VA copolymerCASNO.:25086-89-9Packing: 25kg/ barrelChemical structure: vinylpyrrolidone and vinyl acetate copolymerCTFA Name: NVP/VACOPOLYMERMolecular formula :C6H9NO)nx(C4H6O2)m(n=1.2m)Chemical structure formula: PVP/VA copolymers (VA64, VA37, VA73)Physical properties:White or milky powder, and colorless or light yellow transparent liquid, the clarity of the product solution depends on the amount of vinylpyrrolidone and vinyl acetate. The aqueous solution of VA37 is turbidity, while the aqueous solution of other products is clear at room temperature. The solution is slightly acidic but non-electrolytic.Specifications:Cosmetic grade ​project NVP/VA K value Residual bill% moisture% solid content% PHvalue(10%aqueous solution) heavy metal% (By lead)ppm ash content% VP/VA28W(liquid) 20/80 16-22 ≤0.02 – 50±2 6-8 ≤20 ≤0.1 VP/VA37E(liquid) 30/70 24-32 ≤0.02 – 50±2 6-8 ≤20 ≤0.1 VP/VA55E(liquid) 50/50 24-32 ≤0.02 ≤0.5 50±2 6-8 ≤20 ≤0.1 VP/VA55W(liquid) 50/50 22-30 ≤0.02 – 50±2 6-8 ≤20 ≤0.1 VP/VA84E(liquid) 60/40 30-36 ≤0.02 ≤0.5 50±2 6-8 ≤20 ≤0.1 VP/VA84S 60/40 30-36 ≤0.02 ≤0.5 ≥95 5-7 ≤20 ≤0.1 VP/VA84W(liquid) 60/40 30-36…

Full namePolyvinylpyrrolidone. PolyvinylpyrrolidoneCAS No. 9003-39-8StructionQuality SpecificationK value :88.0 to 98.0Water content :<5.0%Forbidden sulfate ash :<0.1%Aldehyde (acetaldehyde):<0.05%Hydrazine (PPM):<1.0%Residual bill :<0.1%Nitrogen :12.0~12.8%pH value (10% aqueous solution):5.0-9.0Heavy metal %(Pb):<10ppmPeroxide (PPM, hydrogen peroxide):<400Appearance White or milky white powder or particlesContent (Purity) PVPPUses: Used as gas chromatography fixing liquidUpstream raw materials :1, 4-butanediol, monoethanolaminePackage 25 kg/barrel OriginChina, Germany, USA I, etc.Physical PropertiesNature of PVPpolyvinyl pyrrolidone (PVP), a non-ionic polymer, is the most distinctive and widely studied fine chemical variety among N-vinyl amide polymers. Has developed into non-ionic, cationic, anion 3 categories, industrial grade, pharmaceutical grade, food grade 3 specifications, relative molecular mass from thousands to more than one million homopolymer, copolymer and crosslinked polymer series products, and with its excellent unique properties have been widely used.PVP is divided into four stages according to its average molecular weight size, which is usually expressed by the K value, and different K values represent the corresponding average molecular…

Polyvinylpyrrolidone is referred to as PVP, which is a polymer of vinylpyrrolidone, and is divided into soluble PVP and insoluble PVPP(polyvinyl polypyrrolidone) because of its different polymerization degree. The relative molecular weight of soluble PVP is about 8000-10000, which can be used as a precipitating agent and precipitated by interaction with polyphenols. Using this method, PVP is easy to remain in the wine. Polyvinylpyrrolidone (PVP) is not susceptible to chemical reactions. Stored under normal conditions, dry PVP is very stable. Mildew resistant solutions are also stable. When heated to 150℃ in air or mixed with ammonium persulfate at 90℃ for 30min, PVP will be exchanged into water insoluble compounds. In the presence of azo compounds or oxidants such as dichromate, light turns the PVP solution into a gel. The solution is precipitated when co-heated with a strong base (such as sodium silicate or trisodium phosphate). Solubility in various solvents (e.g.,…

2-methyl-1, 3-propylene glycol (MPO) manufacturer introduction 2-methyl-1,3-propanediol (2-Methyl-1,3-propanediol, referred to as MPD) is an organic compound, often used in the synthesis of polyester resin, paint, ink, solvent, antifreeze and other fields. Shanghai Yizhihan Chemical is a manufacturer of 2-methyl-1, 3-propanediol, Shanghai Yizhihan chemical manufacturer provides different specifications and purity of 2-methyl-1, 3-propanediol products, and customized production according to customer needs. Before purchasing, it is recommended to contact the customer service of this site directly to understand the detailed specifications, quality standards, packaging and price information of the product. In addition, relevant regulations and safety guidelines should be followed to ensure the correct use and handling of 2-methyl-1, 3-propanediol. 2-methyl-1, 3-propylene glycol (MPO) price 2-methyl-1, 3-propylene glycol (MPO) price is currently 17,800 yuan/ton (specification ≥99.5%), because the price of the commodity will fluctuate with time and market supply and demand conditions. The price of 2-methyl-1, 3-propanediol (MPO) is influenced by a…

Shanghai Yearn Chemical Company introductionShanghai Yearn Chemical Science-Tech Co., Ltd is a leading PVP and PVPP supplier from China, with more than 15 yearn experience in brewing fining agent industry, we have supplied our products to Europe, Brazil, USA, and Southeast Asia, as well as some local beer brewing factories around Zhejiang Province. We got great reputation among our customers.With food certification and professional equipment, our total capacity reaches to 6000tons/year in this year, including PVP, PVPP, and PVP/PVI.With the increasing of capacity, we are exploring the market in wine, beer, and beverage. We are excited to introduce our product, PVPP & PVP/PVI which can be used as a fining agent and stabilizer in beer brewing, wine, and beverage, hope to start long-term and solid collaboration.Yearn Chemicals China, we create value for you. Shanghai Yearn Chemical PVPP Product introduction Chemical Name: Crospovidone/Polyvinylpyrrolidone cross-linked/交联聚乙烯吡咯烷酮。MF：C6H9NOCAS：25249-54-1 ITEMS/检测项目 Parameters/标准参数 Result/测试结果 Appearance 外观白色或乳白色粉末 White or…

N-methylpyrrolidone, referred to as NMP, is a highly polar aprotic transfer solvent, the appearance of colorless transparent or slightly yellow oily liquid, slightly amine odor, mild irritation to the skin. GBL is dehydrogenated by BDO and then reacts with methylamine to produce NMP.nmp is the only solvent for positive pvdf adhesives. nmp is toxic and carcinogenic, consumes more energy than water by evaporation, and requires solvent recovery systems in industrial applications.NMP-10 from Shanghai Yearn Chemical is an electronic grade N-methylpyrrolidone. NMP-10 high content, good color, low moisture and impurity content, in line with the current national standard GB/T275632011.Electronic grade NMP is mainly used for the preparation of lithium battery cathode material paste and conductive paste, and can also be used in medicine, gel removal liquid solvent, resin synthesis solvent, PUD co-solvent, PUR cleaning agent, etc.Physicochemical index Product characteristicsNMP has a range of excellent properties, including high boiling point, strong polarity,…

PolyvinylPyrrolidone, English name: PolyvinylPyrrolidone, referred to as PVP, is an excellent performance, a wide range of non-ionic water-soluble polymer fine chemicals, from N-vinylpyrrolidione (N-Vinylpyrrolidione, referred to as NVP) by free radical polymerization. PVP has many excellent physical and chemical properties, such as excellent solubility, low toxicity, film forming, solubilization, complexation, physiological compatibility, surface activity and chemical stability.【 Key words 】 POvidone, medicinalWith the development of pharmaceutical preparation technology, POvidone has been used more and more widely as pharmaceutical excipients of non-ionic water-soluble polymer compounds.The excellent physiological compatibility of POvidone series of pharmaceutical excipients is its inherent and unique product properties, and now it has become the three main synthetic pharmaceutical excipients together with cellulose derivatives and acrylic compounds.Povidone series can be divided into a variety of models according to different K values, of which the most widely used varieties are K15, K30 and K90. The Chinese Pharmacopoeia only lists the…

Product name: Methylpropylene glycol MPOEnglish name: 2-Methyl-1, 3-propanediolCommon alias: 2-methyl-1, 3-propylene glycol methyl propylene glycolMain composition and chemical structure:CAS number: 2163-42-0 Molecular formula: C4H10O2 Molecular weight: 90.121Product introductionMethyl propylene glycol is a transparent liquid with low viscosity. Miscible with water, methanol, ethanol, butanol, propylene glycol, propylene glycol monomethyl ether, tetrahydrofuran, acetone, carbonate lactone, styrene, insoluble in cyclohexane, hexane, toluene, xylene. At about -54℃, the viscosity increases and the crystallization is not obvious.Characteristics and uses1. Methylpropylene glycol is a diol with low molecular weight and high boiling point containing 2 primary hydroxyl groups and lateral methyl groups. It is liquid at room temperature and easier to measure and pump than neopentanediol.2, in the field of polyurethane for the production of low crystallization polyester polyols, and can be used as chain extender, the application of synthetic leather slurry, polyurethane coatings, food flexible packaging composite polyurethane adhesive. preparationIn the industry, propylene oxide isomerization…

1, 2-pentanediol cosmetic additive1, 2-pentadiol: has broad-spectrum antibacterial activity, can play the purpose of moisturizing and conditioning skin, often added in skin care products, suitable for sensitive skin, infants and other delicate skin, as well as aging and dry skin care, can also be used for hair care. 1, 2-pentanediol products for personal care products have high purity, colorless, odorless, and no irritating impurities. Its main functions are:Antibacterial: 1, 2-pentanediol has a good inhibitory effect on gram-positive bacteria, negative bacteria, mold, can be added to the bactericide propionazole, made into cream can be applied on the skin, can play a certain antibacterial effect, conducive to inhibiting the growth of pathogenic bacteria. ‍Moisturizing and moisturizing: 1, 2-pentanediol is a good moisturizing agent, added to cosmetics can achieve the moisturizing effect, can play a role in nourishing the skin, but also can quickly supplement the moisture needed by the skin, improve the…