Description

Maleicanhydride CAS NO 108-31-9 is a versatile and highly reactive organic compound, serving as a critical building block in industrial organic synthesis. Its primary value lies in its ability to undergo addition and polymerization reactions, making it indispensable for creating a wide range of high-performance materials and specialty chemicals. This product is essential for manufacturers in the unsaturated polyester resin (UPR), agricultural chemical, and lubricant additive industries.

Application

• Unsaturated Polyester Resins (UPR): A key raw material for producing fiberglass-reinforced plastics used in automotive parts, marine vessels, and construction panels.
• Agricultural Chemicals: Intermediate in the synthesis of herbicides, fungicides, and plant growth regulators.
• Lubricant Additives: Used to manufacture succinimide-based dispersants that keep engines clean and improve oil performance.
• Paper Sizing Agents: Component in alkyl ketene dimer (AKD) and alkenyl succinic anhydride (ASA) sizing for improved water resistance in paper products.
• Copolymer Production: Comonomer with styrene, vinyl acetate, or acrylics to modify polymer properties for coatings, adhesives, and textiles.
• Food Additive Intermediates: Precursor for substances like fumaric and malic acid, used as food acidulants and flavor enhancers.

Basic Information

Product Name	Maleicanhydride
CAS No.	108-31-9
Molecular Formula	C4H2O3
Molecular Weight	98.06 g/mol
Synonyms	Maleic Anhydride; 2,5-Furandione; cis-Butenedioic Anhydride; Toxilic Anhydride; Dihydro-2,5-dioxofuran; MAN; MAH; Maleic Acid Anhydride
EINECS	203-571-6

Quality Control

Our Maleicanhydride is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. The product is tested against rigorous internal specifications, which typically include assay, melting point, and impurity profile analysis. Certificates of Analysis (COA) documenting these results are provided with every shipment and are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can lead to hydrolysis and caking. Recommended storage temperature is between 15°C and 25°C (59°F and 77°F). Keep away from incompatible materials such as strong bases, amines, and oxidizing agents.

Specification

Item	Specification
Appearance	White crystalline solid / Flakes
Identification (IR)	Conforms
Assay (HPLC)	≥ 99.5%
Melting Point	52.0 - 54.0 °C
Color (APHA)	≤ 20
Iron (Fe)	≤ 5 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.