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目前显示的是 十二月, 2024的博文

How to store sodium benzoate

   Identification: CAS No.532-32-1 Molecular Formula:C 6 H 5 CO 2 NA Application: 1.Antiseptic and antimicrobial mainly used in food, medicine, cosmetics, toothpaste, perfumery, tobacco and feed industry 2.Antitrust liquid for cooling system of automobile 3.Anticorrosive for metal Specification: ITEMS OF ANALYSIS SPECIFICATION RESULTS Testing method APPEARANCE: FREE FLOWING WHITE POWDER PASSED IN HOUSE #PSB01 ASSAY (%): 99.00-100.50 99.70 GB1902-2005 LOSS ON DRYING(%): 1.5MAX 0.90 GB/T 6678-2003. 7.6 (1:10)COLOR OF SOLUTION (HAZEN): 20MAX QUALIFIED GB/T3134 APPEARANCE OF SOLUTION: PASS QUALIFIED GB1902-2005 OXIDIZABLE SUBSTANCE EXPERIMENT: PASS QUALIFIED GB1902-2005 ACIDITY AND ALKALINITY: PASS QUALIFIED GB1902-2005 HEAVY METAL (AS Pb) (PPM): 10MAX 6 GB/T5009.74 ARSENIC(As) (PPM): 2MAX 1.05 GB/T5009.76 CHLORIDE (PPM): 300MAX 225 GB1902-2005 PHTHALIC ACID: PASS 300 GB1902-2005 ORGANIC VOLATILE IMPURITIES: IN CONFORMITY WITH THE REGULATIONS QUALIFIED GB1902-2005 CONCLUSION: CONF...

How to use sodium benzoate

   Identification: CAS No.532-32-1 Molecular Formula:C 6 H 5 CO 2 NA Application: 1. Antiseptic and antimicrobial mainly used in food, medicine, cosmetics, toothpaste, perfumery, tobacco and feed industry 2. Antitrust liquid for the cooling system of automobile 3.Anticorrosive for metal Specification: ITEMS OF ANALYSIS SPECIFICATION RESULTS Testing method APPEARANCE: FREE FLOWING WHITE POWDER PASSED IN HOUSE #PSB01 ASSAY (%): 99.00-100.50 99.70 GB1902-2005 LOSS ON DRYING(%): 1.5MAX 0.90 GB/T 6678-2003. 7.6 (1:10)COLOR OF SOLUTION (HAZEN): 20MAX QUALIFIED GB/T3134 APPEARANCE OF SOLUTION: PASS QUALIFIED GB1902-2005 OXIDIZABLE SUBSTANCE EXPERIMENT: PASS QUALIFIED GB1902-2005 ACIDITY AND ALKALINITY: PASS QUALIFIED GB1902-2005 HEAVY METAL (AS Pb) (PPM): 10MAX 6 GB/T5009.74 ARSENIC(As) (PPM): 2MAX 1.05 GB/T5009.76 CHLORIDE (PPM): 300MAX 225 GB1902-2005 PHTHALIC ACID: PASS 300 GB1902-2005 ORGANIC VOLATILE IMPURITIES: IN CONFORMITY WITH THE REGULATIONS QUALIFIED GB1902-2005 CONCLUSION...

What are the applications of wetting agents?

  Wetting agents , or wetting agents, are substances capable of reducing surface tension and enhancing wettability. They have a wide range of applications across various industries. Here's an overview of the applications of wetting agents: 1. Agricultural Production Enhancing Water and Fertilizer Utilization : By using pesticides and fertilizer solutions containing wetting agents, the water absorption and nutrient uptake capacity of plant leaves can be increased, thereby enhancing plant stress resistance and yield. Soil Moisture Retention : Wetting agents help retain soil moisture for longer periods and improve soil aeration, which facilitates microbial activity and fertilizer decomposition. 2. Industrial Manufacturing Paints and Inks : Wetting agents are essential additives in paints and inks, improving their performance, quality, and service life. They enhance the wettability of the coating material on the substrate, improving adhesion and overall coating quality. Pharmaceutical ...

Wetting Penetrants and Surfactants: Differences and Relationships

  Wetting penetrants and surfactants have close ties in the field of chemistry, but there are also some differences between them. Below is a detailed comparison of these two concepts. I. Definitions and Classifications Wetting Penetrants Wetting penetrants are substances that can reduce the liquid-solid interfacial tension, increase the contact of liquid with solid surfaces, or enhance the wetting and spreading of liquids on solid surfaces. They typically have specific chemical structures, such as alkylphenol ethoxylates and fatty alcohol ethoxylates, which give them wetting and penetrating properties. Surfactants Surfactants are substances that, when added in small amounts, can significantly change the interfacial state of a solution system. They have fixed hydrophilic and lipophilic groups and can orient themselves at the solution surface. Based on their molecular structures, surfactants can be classified into ionic surfactants (including cationic and anionic surfactants), non-i...

Chemical properties of epoxy resin curing agents

 The chemical properties of " Epoxy Hardener ," typically referring to the compounds that undergo chemical reactions with epoxy resins to crosslink and cure them, can be outlined from several aspects: Reactivity One of the most significant chemical properties of epoxy hardeners is their high reactivity. The active functional groups in the hardener (such as amine groups, anhydrides, hydroxyl groups, etc.) can react with the epoxy groups in the epoxy resin to form an insoluble and infusible three-dimensional network structure, thereby curing the epoxy resin. This reaction is usually exothermic and can be accelerated by heating. Types and Structures Epoxy hardeners are diverse in types and structures. Common hardeners include amine-based hardeners, anhydride-based hardeners, phenolic hardeners, etc. The structural characteristics of these hardeners determine their reactivity, curing speed, curing temperature, and the properties of the cured product.\ Items BYT-9405 Appearance Co...

Information about methyl isopentyl keton

  Methyl Isobutyl Ketone (MIBK) is commonly used for a variety of purposes, primarily due to its unique properties as a solvent and intermediate in chemical reactions: CAS: 110-12-3. Chemical formula: C7H14O, also expressed as CH3COCH2CH2CH(CH3)2. Table 1: Physical Properties of Methyl Isobutyl Ketone (MIBK) Property Description CAS Number 110-12-3 Formula C7H14O Molecular Weight 114.18 g/mol Appearance Clear, colorless liquid Odor Characteristic, slightly fruity Density Approximately 0.81 g/mL at 20°C Boiling Point Approximately 144°C (363.15 K) Flash Point (Open Cup) Approximately 41°C Solubility in Water Slightly soluble Solubility in Organic Solvents Soluble in ethanol, ether, etc. Refractive Index Approximately 1.397 at 20°C Vapor Pressure Moderate, depending on the temperature Viscosity Low, depends on temperature Table 2: Chemical Properties of Methyl Isobutyl Ketone (MIBK) Property Description Chemical Class Ketone Functional Groups Carbonyl group (C=O) Reactivity Moderate...

Chemical properties and storage methods of trimethylbenzene phosphate

 The chemical properties and storage methods of Phosphotrimethylphenol (or Trimethylphenyl Phosphate , often abbreviated as TMPP) are as follows: Chemical Properties Molecular Structure and Formula : TMPP belongs to the category of phosphate esters, with a chemical formula of (CH3C6H4O)3P=O or C21H21O3P. It exists as a colorless or light yellow transparent oily liquid, with a relative density of approximately 1.162 (at 25°C). Physical State and Solubility : TMPP is an oil-like liquid at room temperature. It is insoluble in water but soluble in organic solvents such as ethanol, ether, chloroform, benzene, and glacial acetic acid. Thermal Stability : TMPP has a high boiling point, typically around 410°C (with partial decomposition). It remains stable under normal conditions and does not burn. Toxicity : TMPP is toxic, especially its ortho-isomer, which is approximately 10 times more toxic than other isomers. Storage Methods Storage Environment : TMPP should be stored in a cool, well-...

Uses of Trimethylbenzene Phosphate

 Phosphotrimethylphenol (or Trimethylphenyl Phosphate , abbreviated as TCP) boasts a multitude of applications across various industries: Flame Retardant : TCP serves as a crucial plasticizer and flame retardant additive in the production of vinyl esters, nitrocellulose, polyvinyl chloride, cable rubber products, and flexible polyurethane foam plastics. It enhances the wear resistance, weatherability, mold resistance, radiation resistance, and electrical properties of polymers. Furthermore, it is utilized as a plasticizer for epoxy resin adhesives, imparting flame-retardant properties. Solvent : As a highly effective solvent with robust solvency, TCP can dissolve numerous organic compounds and dyes. It finds extensive application in the manufacture of dyes, paints, inks, and cleaning agents. Pharmaceutical Formulations : In the pharmaceutical sector, TCP acts as an efficient solubilizer and enhancer, improving the stability and bioavailability of drugs. It also functions as a disp...

What is the molecular structure of hydroxy acrylic copolymer emulsion?

 The molecular structure of hydroxy acrylic copolymer emulsion consists of a polymer chain formed through the polymerization of numerous hydroxy acrylic acid monomers. Here is a detailed elucidation of its molecular structure: Monomer Structure : The hydroxy acrylic acid monomer, which serves as the building block of the copolymer emulsion, contains a hydroxyl group (-OH) and an acrylic acid moiety (CH2=CHCOOH). The hydroxyl group is hydrophilic, capable of forming hydrogen bonds with other molecules, while the acrylic acid moiety possesses an unsaturated double bond, imparting high reactivity to the monomer. Polymerization Reaction : When multiple hydroxy acrylic acid monomers undergo polymerization under certain conditions, they are covalently linked into a long chain, forming the hydroxy acrylic copolymer. This polymerization process can be radical, anionic, or cationic, depending on the reaction conditions and catalyst used. Copolymer Structure : The molecular structure of the...

Application fields of hydroxylated acrylic copolymer emulsion

  Hydroxyacrylic copolymer emulsion is a high molecular polymer emulsion that is widely used in many fields because of its unique properties. Here’s a detailed look at its uses: Coating field: Hydroxy acrylic copolymer emulsion is often used as a film-forming substance for wall coatings, waterproof coatings, and other coatings. It can effectively improve the film-forming performance, weather resistance, and bonding performance of coatings. In the fields of wood coatings, metal coatings, etc., it also has the advantages of enhanced coating adhesion, water resistance, UV resistance, etc., and is widely used in the coating of furniture, automobile surfaces, electronic products, etc. Adhesive field: Hydroxy acrylic copolymer emulsion is the main component of waterproof glue, structural glue, and other adhesives, and can significantly improve adhesive performance and water resistance of the adhesive. Fabric coating and printing: In fabric coating processes or printing coatings, hydroxy...

How to store epoxy paint?

The storage method of epoxy paint is crucial. Improper storage may cause its performance to deteriorate and even cause safety accidents. The following are some key steps and precautions for the storage method of epoxy paint: 1. Storage environment Special warehouse: A special warehouse should be prepared to store epoxy paint. The warehouse should be kept dry, cool, ventilated, and avoid direct sunlight and high-temperature environments. The warehouse should be ventilated regularly to maintain air circulation. Temperature and humidity control: The storage temperature of epoxy paint should be controlled within a certain range. It is generally recommended to be between 15℃ and 25℃, and the humidity should be kept between 50% and 75%. Such an environment helps to maintain the stability of the performance of epoxy paint. 2. Storage method Neatly placed: Epoxy paint should be neatly placed in the warehouse to avoid confusion and mutual squeezing. If conditions permit, it is best not to stac...

Chemical properties of industrial epoxy paint

  Industrial epoxy paint is a coating that has developed rapidly in recent years. Its chemical properties are stable and excellent. The following is a detailed analysis of its chemical properties: 1. Chemical stability The epoxy resin cured by epoxy paint has stable chemical properties and can resist corrosion from a variety of chemicals, including acids, alkalis, salts, and organic solvents. This is because there is no ester bond in epoxy resin, the aliphatic hydroxyl groups contained do not react with alkali, and the paint solidification product is a three-dimensional network structure. Therefore, epoxy resin coatings are often used as anti-corrosion primers, oil tanks, and other inner walls. 2. Weather resistance and corrosion resistance Although epoxy paint has relatively poor weather resistance and may cause powdering under long-term sunlight exposure, it has strong adhesion to inorganic materials such as cement and metal, especially to substrates such as stainless steel, alum...

Chemical properties of self-drying alkyl acid wetting and dispersing agents

  Self-drying alkyl acid wetting and dispersing agents are specific chemicals whose chemical properties can be described from the following aspects: 1. Basic chemical composition Self-drying alkyl acid wetting and dispersing agents are usually composed of a variety of chemical ingredients, including but not limited to alkyl acids, self-drying groups, surfactants, and other functional additives. These ingredients work synergistically in the molecular structure to give the dispersant unique wetting, dispersing, and self-drying properties. 2. Wetting and dispersing properties Wettability: Self-drying alkyl acid wetting and dispersing agents have excellent wetting properties, which can significantly reduce the surface tension of the coating, making it easier for the coating to penetrate into the surface of the coated object, and improve the adhesion between the coating and the substrate. Dispersion: This dispersant can effectively disperse pigments and fillers to prevent their aggrega...

What is the difference between wetting dispersants and self-drying alkyl acid wetting dispersants?

 Wetting dispersants and self-drying alkyl acid wetting dispersants are essentially wetting dispersants, but there may be some differences in their specific ingredients, characteristics, and application scenarios. The following is a detailed comparison of the two: 1. Definition and composition Wetting dispersant: It is a surfactant that can reduce the interfacial tension between liquid/solid, improve the dispersion efficiency of pigments, and improve the storage stability of coatings. The ingredients are diverse and may include modified polyesters, polycarboxylic acid-alkyl ammonium salts, unsaturated fatty acid polyamine amides, and acidic polyester salt solutions. Self-drying alkyl acid wetting dispersant: It is a type of wetting dispersant, with special emphasis on its self-drying and alkyl acid components. Self-drying means that the dispersant can promote the drying process of the coating in the coating. The alkyl acid component may provide it with specific chemical properties...

Analysis of the test method for water permeability of protective clothing

  The thermal protection performance of protective clothing is a key test item for many protective clothing. Since people wear such clothing to work in dangerous environments, such as fire scenes or rescue moments and other high-temperature working environments, protective clothing must ensure the safety of the human body, so a reasonable evaluation of the thermal protection performance of protective clothing must be made. Here, Standard Group (Hong Kong) Co., Ltd. uses experimental methods to describe the necessity of such experiments. Subject content and scope of application This standard specifies the performance requirements and test methods for ordinary protective clothing for firefighters. This standard applies to ordinary protective clothing used by firefighters and does not apply to other protective clothing such as thermal insulation clothing and fire-avoiding clothing. Reference standards GB 250 Grey scale for evaluating discoloration GB 3918 Fabric tear strength test met...

chemical properties of benzyl chloride

  Benzyl chloride , also known as benzyl chloride or α-chlorotoluene, possesses distinct chemical properties. Here is a detailed overview of its chemical properties in English: Chemical Properties of Benzyl Chloride Physical State and Appearance : Benzyl chloride is a colorless to slightly yellow transparent liquid. It has a strong, pungent, and irritating odor. Molecular Formula and Structure : Molecular formula: C7H7Cl Molecular weight: 126.59 (or 126.583, depending on the precision) It is a compound formed when one hydrogen atom of benzene is replaced by a chloromethyl group. Solubility : It is insoluble in water. It is miscible with most organic solvents such as ethanol, chloroform, and ether. Physical Constants : Density: 1.10 g/cm³ (at 25°C) Melting point: -39°C Boiling point: 179°C Flashpoint: 67°C (closed cup) Refractive index: 36.01 (molar) Molar volume: 117.1 cm³/mol Surface tension: 33.8 dyne/cm Polarizability: 14.27 (10^-24 cm³) Chemical Reactivity : Benzyl chloride is ...

Uses of Benzyl Chloride

  Benzyl chloride , also known as benzyl chloride or α-chlorotoluene, serves as an important organic intermediate with a wide range of applications and functions. Here is a detailed overview of its uses and roles in English: Uses of Benzyl Chloride As a Raw Material in Manufacturing : Benzyl chloride is widely used in the production of dyes, perfumes, pharmaceuticals, synthetic tannins, and synthetic resins. It is a crucial raw material for synthesizing benzaldehyde, benzyl benzoate, benzylamine, phenylacetonitrile, and other compounds. In the Pesticide Industry : Benzyl chloride can be directly used to synthesize organic phosphorus fungicides such as benzothiazole and isobenzothiazole. It also serves as an important raw material for synthesizing intermediates like phenylacetonitrile, benzoyl chloride, and m-phenoxybenzaldehyde. In the Pharmaceutical Industry : Benzyl chloride is used in the synthesis of various pharmaceuticals, including benzyl penicillin and other benzyl-containi...

Wool Wax: An Introduction and Its Production Process

  Wool wax , a high-melting-point hard wax separated from USP lanolin, possesses a complex composition primarily consisting of esters formed from higher fatty acids (including hydroxy acids) and higher monohydric alcohols, along with free fatty acids, free fatty alcohols, and hydrocarbons. This unique material finds extensive applications across various industries, notably in the cosmetics sector and beyond. Applications in the Cosmetics Industry : In the realm of cosmetics, wool wax serves as an excellent alternative to or partial substitute for USP-grade lanolin in products such as face creams, lotions, lipsticks, and lip balms. Its superior stability and compatibility ensure enhanced performance in these formulations. Moreover, wool wax's emulsifying properties, stability, and ability to inhibit the crystallization of other waxy substances make it an invaluable addition in numerous industrial applications. Production Process of Wool Wax : The typical method for producing wool wa...

Technical advantages of paper clip scratch tester

  As a device specially used to evaluate the wear resistance and scratch resistance of material surfaces, paper clip scratch tester plays an important role in materials science, manufacturing and consumer products. Shanghai Qianshi Precision Electromechanical Technology Co., Ltd. was established in 2012. It focuses on the research, development, design and production of textile testing instruments, and provides textile testing instruments and services for academic research units and testing institutions. Shanghai Qianshi is one of the most competitive and R&D textile testing instrument manufacturers in China. The R&D team is composed of a group of experienced engineers. We are committed to serving customers wholeheartedly and striving to promote technological innovation of textile testing instruments. Working principle: The basic working principle is to conduct quantitative and qualitative tests on the surface of materials by simulating the scratching conditions that may be ...

The application areas of Chinese lacquer wax

  Chinese Lacquer Wax , a versatile substance derived from the seeds of the lacquer tree, plays a pivotal role in numerous fields, showcasing its unique properties and diverse applications. Arts and Crafts Preservation In the realm of arts and crafts, Chinese Lacquer Wax serves as a crucial ingredient in the production of lacquerware, adding an artistic flair and distinct texture to furniture, stationery, and other crafts. Its ability to resist water, oil, and wear makes it an ideal protective layer for preserving the integrity and beauty of these items against environmental degradation. Medical Applications Within the medical domain, Chinese Lacquer Wax finds application in traditional medicine, particularly in the formulation of plaster medications, facilitating enhanced skin penetration and efficacy of the active ingredients. Modern medical research also explores its potential in drug carrier systems and sustained-release formulations, leveraging its stability and efficacy-enhan...

How to make Chinese lacquer wax?

  Chinese lacquer wax , also known as wood wax, is a vegetable fat derived from the fruits of the lacquer tree (Toxicodendron verniciflua Stokes.). It boasts unique properties and a myriad of applications. As a hydrophobic substance insoluble in water, it belongs to the category of authentic plant waxes. With a high melting point, it remains solid at room temperature, exhibiting a delicate texture, excellent penetration, adhesive tenacity, and a smooth feel. In terms of usage, lacquer wax serves as a nourishing agent for furniture, protecting its surface, isolating it from dirt, and keeping the base material clean. It can penetrate the tiny pores on the wood's surface, allowing the wood to breathe naturally and maintaining its natural elasticity, thereby preventing cracking. Furthermore, the protective film formed by lacquer wax has a glossy and warm appearance, enhancing the wood's surface hardness and brightness, while preserving its luminous color. In Yunnan's Nujiang re...