Colorless orthogonal needle-like crystal or white crystalline powder. Soluble in water, acetone, benzene, chloroform and other organic solvents. 25 ℃ in the following solvents in the solubility ( gllOOg): acetone 227, ethyl acetate 112, chloroform 52.5 I benzene 50 I toluene 23.4; o-xylene 19.4; carbon tetrachloride 0. 60; petroleum ether 0.25. Dissolved in alcohol to produce esters. Soluble in dioxane. Sublimated by heat. Danger of combustion when exposed to high heat, open flame or in contact with oxidizing agents. Corrosive. Slowly hydrolyzed in cold water to form maleic acid. Contact with strong oxidizing agents can cause combustion and explosion. If the temperature exceeds 66℃, polymerization reaction will occur in contact with amines or alkali metals.
Preparation method of Maleic Anhydride
Malic acid is reacted with acetyl chloride at a certain temperature, after the reaction is completed, it is distilled and then recrystallized with trichloromethane to obtain pure maleic anhydride.
Uses of Maleic Anhydride
Reagent for the determination of organic compounds with conjugated double bonds. Also used in synthetic resins, coatings, pesticides, pharmaceuticals, food, and lubricant additives.
Plastic industry for the manufacture of plasticizers. Used in paper industry to manufacture paper treatment agent. Synthetic resin industry for the manufacture of unsaturated polyester resins, alkyd resins and so on. Paint industry for the manufacture of insulating paint, white magnetic paint, baking paint, varnish, etc.. Pesticide industry for the manufacture of pesticides Marathon and high-efficiency and low-toxicity pesticide 4049. Pharmaceutical industry for the manufacture of long-acting sulfonamides. It is used as preservative of fat and oil in oil and grease industry. Used in organic industry to manufacture fumaric acid and tetrahydrofuran. Used as chemical reagent in analytical chemistry.
Safety of Maleic Anhydride
The dust and vapor are irritating. Staff should be well protected and the working environment should be well ventilated. It should be stored separately from oxidizers and alkalis. Store in cool and ventilated warehouse. Keep away from fire and heat source. Prevent direct sunlight. Packing must be sealed, do not expose to moisture. Company information
The company's main import and export products include:(1)Flavors and Fragrances are volatile substances. They have a certain aroma and fragrance, can be people smell taste out (some aroma and fragrance in the case of people can not be perceived by the senses, but will be different creatures feel and distinguish out); requirements to achieve the purpose of the people's favourite, the spirit of pleasure and enrichment and beautification of the material and cultural life of the people.(3)Intermediates:It is a very important type of fine chemical products, the essence of a class of "semi-finished products", is the production of some products in the middle of the product, such as to produce a product, can be produced from the intermediates, cost savings, from the synthesis of pharmaceuticals, pesticides, paints, dyes and fragrances are widely used. In the pharmaceutical field, intermediates are an important link in the pharmaceutical industry chain, used in the process of drug synthesis of some chemical raw materials or chemical products, in a word, used to produce APIs.Our Intermediates products include Synthetic Material Intermediates,Dye Intermediates, Flavors and Fragrances intermediates. 