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DIALLYL ISOPHTHALATE CAS: 1087-21-4
DIALLYL ISOPHTHALATE CAS: 1087-21-4，Also known as level four reagent。Belongs to propyl ester compounds。
Diallyl isophthalate polymers are very similar in preparation, properties and applications to the diallyl isophthalate polymers described above. Moldings based on diallyl isophthalate are more expensive but offer enhanced thermal stability (can withstand temperatures up to approximately 220°C for long periods of time) and resistance to organic solvents.
It is a light yellow oily liquid. Slightly smelly. Miscible with ethanol, insoluble in water.
Mainly used for biochemical research. Organic Synthesis. Preparation of high temperature resin。 -
N,N-Bis(2-cyanoethyl)aniline CAS: 1555-66-4
N,N-Bis(2-cyanoethyl)aniline CAS: 1555-66-4
White crystal powder. Easily soluble in organic solvents, dilute acids and dilute alkali, but insoluble in water. Used as dye intermediate。
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N,N-Dimethylbenzylamine CAS: 103-83-3
N,N-Dimethylbenzylamine CAS: 103-83-3
N,N-dimethylbenzylamine is often used as a reagent in organic synthesis and as a catalyst for the synthesis of polyurethane foam and epoxy resin. It reacts with Os3(CO) to form a triosmium cluster.
N,N dimethylbenzylamine in methanol-tetra-N-butyl ammonium fluoroborate and methanol-potassium hydroxide. Used in the synthesis of bis[(N,N-dimethylamino)benzyl]selenoether. It can also be used as an organic synthesis intermediate, dehydrogenation catalyst, preservative, acid neutralizer, etc.
It is colorless to light yellow flammable liquid. It smells like ammonia. Easily soluble in ethanol and ether, hardly soluble in water.
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4-Methyldiphenylamine CAS: 620-84-8
4-Methyldiphenylamine CAS: 620-84-8
Organic raw materials: cycloalkylamines, aromatic monoamines, aromatic polyamines and their derivatives and salts。Appearance is white crystal。Mainly used for organic synthesis intermediates, synthesis of organic functional materials and medicines, as well as photochemistry and liquid crystal intermediates. Insoluble in water. Soluble in benzene, toluene,methanol, ethanol。 for the storage condition ,Keep in dark place,Sealed in dry,Room Temperature.
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N,N-Dimethylacetamide CAS: 127-19-5
N,N-Dimethylacetamide CAS: 127-19-5
Chemical properties: The chemical properties are very similar to N,N-dimethylformamide, and it is a representative amide solvent. In the absence of acid or alkali, it will not decompose when heated to boiling under normal pressure, so it can be distilled under normal pressure. The hydrolysis rate is very slow. When N,N-dimethylacetamide containing 5% water is heated at 95°C for 140 hours, only 0.02% is hydrolyzed. However, in the presence of acid and alkali, the hydrolysis rate increases. Saponification occurs when heated in the presence of a strong alkali.
application
1. Pharmaceutical intermediate dimethylacetamide is an important pharmaceutical raw material and is widely used in the production of amoxicillin, cephalosporins and other drugs. As a solvent or cocatalyst, dimethylacetamide can improve product quality and yield compared with traditional organic solvents. In 2000, the demand for dimethylacetamide in the pharmaceutical industry was approximately 6kt. The demand for dimethylacetamide in 2006 was approximately 9.6kt. 2. Acrylic fiber production In the production of acrylic fiber, some use the dimethylacetamide route. At present, domestic acrylic fiber production Chemicalbook mainly includes sodium thiocyanate two-step method, dimethylformamide one-step method and dimethylacetamide organic wet method according to solvents. From the perspective of process and equipment characteristics, material consumption, environmental impact, product quality, Many factors such as post-processing performance, localization rate and foreign development trends have increased application research and promotion efforts. Dimethylacetamide was used as a comprehensive comparison. Sodium thiocyanate two-step method and dimethylacetamide organic wet method were used. The most promising development. At present, many acrylic fiber installations in China use wet processes using dimethylacetamide as the solvent. -
Allyl alcohol CAS: 107-18-6
Allyl alcohol CAS: 107-18-6
nature
Colorless liquid with pungent mustard odor. Relative density o. 8520. Freezing point -129℃. Boiling point 96.9℃. The critical temperature is 271.9℃. Flash point (closed cup) 22.2℃. It becomes vitreous at -190℃. Refractive index 1. 4132. Miscible with water, ether, ethanol, chloroform and petroleum ether.
use
It is an intermediate for the production of glycerin, pharmaceuticals, pesticides, spices and cosmetics, and is also a raw material for the production of diallyl phthalate resin and bis(2,3-bromopropyl)fumarate. Silane derivatives of allyl alcohol and copolymers with styrene are widely used in coatings and glass
fiber industry. Allyl urethane can be used in photosensitive polyurethane coatings and casting industries.
safety
It has a special odor and can strongly irritate the eyes, skin, throat, and mucous membranes. In severe cases, it can cause blindness. Adhering to the skin can cause it to turn red and cause burns, and is rapidly absorbed through the skin, causing liver disorders, nephritis, hematuria and other symptoms. One of the most toxic alcohols, the oral LD50 in rats is 64rng/kg. Dog oral LD50 40mg/kg. The maximum allowable concentration in the air at the production site is 5rng/m3. At this concentration, the irritation is very strong and cannot be tolerated for a long time. If it splashes on the skin, rinse with water and apply grease-based medicine. Wear protective equipment when operating. -
Dicyclohexylamine CAS：101-83-7
Dicyclohexylamine CAS：101-83-7
Dicyclohexylamine is prepared by using aniline as raw material and hydrogenating it at high temperature and high pressure in the presence of a catalyst.
It is widely used as an intermediate in organic synthesis and can be used to prepare dye intermediates, rubber accelerators, nitrocellulose paints, insecticides, catalysts, preservatives, gas phase corrosion inhibitors and fuel antioxidant chemical book additives, etc. Also used as an extraction agent. Fatty acid salts and sulfates of dicyclohexylamine have the stain-removing properties of soap and are used in the printing, dyeing and textile industries. Its metal complexes are used as catalysts for inks and paints.
Colorless and transparent oily liquid with pungent ammonia smell. Slightly soluble in water, miscible with organic solvents. -
N-Methylformamide（NMF） CAS：123-39-7
N-Methylformamide（NMF） CAS：123-39-7
Pure N-methylformamide is a colorless, transparent and viscous liquid, m.p.-3.8℃, b.p.198℃, n25D 1.4310, relative density 0.9986 (25℃), soluble in water, can also dissolve inorganic salts, and is hygroscopic. Easily decomposes in acidic or alkaline solutions.
N-methylformamide is an important organic synthetic raw material. It is used in the synthesis of pesticides, insecticides and acaricides monoformamidine and diformamidine. It is also used in the production of medicine, synthetic leather, artificial leather, and as a solvent for chemical fiber textiles. .
Production method 1. Methylamine method is produced by the reaction of methylamine and carbon monoxide. 2. Methyl formate method is obtained by the reaction of methyl formate and methylamine. 3. Obtained from the reaction of ethyl formate and methylamine. Add ethyl formate into the reactor, add methylamine aqueous solution under cooling, and reflux the reaction at 40°C. Then it was left for 3 days, and ethanol was recovered under reduced pressure to obtain crude product. The finished product is obtained by distillation under reduced pressure.
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3-Dimethylaminopropylamine CAS: 109-55-7
Diamine is an important class of chemical substances that are widely used as raw materials, intermediates or products. For example, diamine is an important structural unit in the synthesis of polyamide and other condensation polymerization reactions. N,N-dimethyl-1Chemicalbook,3-diaminopropane (DMAPA) is an important intermediate, used for example in the industrial preparation of lubricants. In addition, DMAPA is used as a raw material for the preparation of coagulants and itself should have Anti-corrosion properties.
It is colorless transparent liquid. Soluble in water and organic solvents. Widely used in the manufacture of cosmetic raw materials, such as palmitamide dimethylpropylamine, cocamidopropyl betaine, mink oil amidopropylamine, etc.
Using dimethylaminopropionitrile [1738-25-6] as raw material, hydrogenation and methanol are added in the presence of Ni-Al catalyst, and then filtered and distilled to obtain the finished product of 3-dimethylaminopropylamine. The purity of the obtained product can reach more than 99%, and each ton of product consumes 1150kg of dimethylaminopropionitrile. -
2-(N-Ethyl-m-toluidino)ethanol CAS: 91-88-3
N-ethyl-N-hydroxyethyl m-toluidine (2-(Ethyl(m-tolyl)amino)ethanol) is a light yellow liquid and a dye intermediate. Used to produce cationic dyes, such as cationic red 6B. It is also used as a raw material for the production of color developers and medicines.
Usage: 1. Dye intermediates.
Second, it is used to produce cationic dyes, such as cationic red 6B.
3. Used as raw materials for the production of color developers and medicines.
production method
1. m-toluidine method
It is prepared from m-toluidine and ethyl iodide as raw materials.
Two, N-ethyl m-toluidine method
It is prepared by using N-ethyl m-toluidine as raw material and reacting with chloroethanol (or ethylene oxide).
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N,N-Dimethylformamide CAS 68-12-2
Dimethylformamide is a colorless and transparent liquid. It is not only a widely used chemical raw material, but also an excellent solvent with a wide range of uses. Dimethylformamide is an important raw material for pharmaceutical, petrochemical, leather and other industries。
Dimethylformamide is referred to as DMF. It is a compound in which the hydroxyl group of formic acid is replaced by a dimethylamino group, with the molecular formula HCON(CH3)2. It is a colorless and transparent high-boiling point liquid with a light amine smell and a relative density of 0.9445 (25℃). Melting point -61℃. Boiling point 152.8℃. Flash point 57.78℃. Vapor density 2.51. Vapor pressure 0.49kpa (3.7mmHg25℃). Autoignition point is 445℃. The explosion limit of steam and air mixture is 2.2~15.2%. Exposure to open flames and high heat may cause combustion and explosion. It can react violently with concentrated sulfuric acid and fuming nitric acid and even explode. It is miscible with water and most organic solvents Chemicalbook. It is a common solvent for chemical reactions. Pure dimethylformamide has no odor, but industrial grade or deteriorated dimethylformamide has a fishy smell because it contains dimethylamine impurities. The name comes from the fact that it is a dimethyl substitute of formamide (amide of formic acid), and both methyl groups are located on the N (nitrogen) atom. Dimethylformamide is a polar (hydrophilic) aprotic solvent with a high boiling point, which can promote the SN2 reaction mechanism. Dimethylformamide is made from formic acid and dimethylamine. Dimethylformamide is unstable (especially at high temperatures) in the presence of strong bases such as sodium hydroxide or strong acids such as hydrochloric acid or sulfuric acid, and hydrolyzes to formic acid and dimethylamine.
It is very stable in the air and when heated to boiling. When the temperature is higher than 350°C, it loses water and generates carbon monoxide and dimethylamine. N,N-dimethylformamide is a very good aprotic polar solvent that can dissolve most organic and inorganic substances and is miscible with water, alcohols, ethers, aldehydes, ketones, esters, halogenated hydrocarbons and aromatic hydrocarbons. . The positively charged end of the N,N-dimethylformamide molecule is surrounded by methyl groups, forming a spatial Chemicalbook barrier that prevents negative ions from approaching and only associates positive ions. Bare anions are much more active than solvated anions. Many ionic reactions are easier to carry out in N,N-dimethylformamide than in general protic solvents. For example, carboxylates and halogenated hydrocarbons react in N,N-dimethylformamide at room temperature. , can generate esters with high yields, and is particularly suitable for the synthesis of sterically hindered esters.
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N,N-Diethylaniline CAS:91-66-7
N,N-Diethylaniline CAS:91-66-7
Colorless to yellow liquid. Has a special smell. Slightly soluble in water, soluble in organic solvents such as ethanol, ether, chloroform and benzene. Derived from the reaction of aniline and ethyl chloride. Raw material consumption quota: aniline 645kg/t, ethyl chloride (95%) 1473kg/t, caustic soda (42%) 1230kg/t, phthalic anhydride 29kg/t.
It can be used to prepare azo dyes, triphenylmethane dyes, etc. It is also an important intermediate for the synthesis of drugs and color film developers, and its applications are very wide.
Storage : The warehouse is ventilated and dried at low temperature; stored separately from acids, oxidants and food additives.
