Maleic acid, also known as maleic acid (chemical formula HO2CCHCHCO2H), is a dicarboxylic acid, that is, an organic compound containing two carboxylic acid functional groups. Maleic acid and fumaric acid (fumaric acid) are cis-trans isomers of each other. Maleic acid is commonly used to prepare fumaric acid, maleic acid's anhydride is maleic anhydride, and its acid anhydride compared to maleic acid, maleic acid has fewer applications. Maleic acid and its acid anhydride are not approved food additives, but the United States and the European Union have limited permission to use maleic anhydride in packaging materials directly or indirectly in contact with food, and the United States also allows the use of maleic acid as an acid-base concoction in cosmetics.

Appearance and properties: white solid

Density: 1.59 g/mL at 25oC(lit.)

Boiling point: 355.5oC at 760 mmHg

Melting point: 134-138oC

Flash point: 127oC

Refractive index: 1.526

Stability: Stable. Combustible. Incompatible with strong oxidizing agents, bases.

Storage: Store at RT.

Vapor pressure: 0mmHg at 25°C

COMPANY PROFILE

Hebei yanxi chemical co.,Itd is a professional research and development of the production of lead acetate,2-phenylethylamide enterprises.The key members of the company are established by local well-known entrepreneurs and professional engineers under the call and support of the party's"low-carbon environmental protectionsafety and stability"under the innovation in traditional production equipment and technology,the use of"high temperature cooling"and "plastic basin crystallization"technology,on the basis of reducing the cost of products to make the quality of products to the same industryWith the efforts of all the staff of the companywe have established many cooperative companies in Shan Dong,He Nan,Guang Dong and other places in recent decades. Under the close supervision of the quality inspection department of the company,we carry out production and sales in the way of "labeling",providing the most convenient and fastest service for users all over the countryCompanies in the"advance with The Timesand the city every day with the advancement of"under the guidance of the core ideasadhering to the"relying on scientific and technological innovationthe development of circular economy" of the enterprise purpose,established in the marketenhance strength,go the way of science and environmental sustainable developmentrelying on the national technology research and development center, increasing spending on research and development based on the domestic market, expand the international marketmanufacturing high quality productssincere service society,toward a modern, ecology, science and technologychemical enterprises of the world.