Description

2-Methylmaleic Acid Diethyl Ester is a versatile organic ester derivative of maleic acid, serving as a key chemical intermediate in advanced synthesis. Its value lies in its reactive diene and ester functionalities, enabling its use in Diels-Alder reactions and polymer modifications. This compound is essential for R&D chemists and manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries seeking to build complex molecular architectures.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs) and complex organic molecules via cycloaddition reactions.
• Agrochemical Synthesis: Used in the production of advanced crop protection agents and herbicides.
• Polymer & Resin Modifier: Acts as a cross-linking agent or comonomer to modify the properties of specialty polymers, coatings, and adhesives.
• Organic Synthesis Reagent: Employed in research laboratories as a dienophile in Diels-Alder reactions to construct cyclic compounds.
• Fine Chemical Production: Utilized in the manufacture of dyes, flavors, and fragrances.
• Chemical Research & Development: Serves as a standard or starting material for developing new synthetic methodologies and novel compounds.

Basic Information

Product Name	2-Methylmaleic Acid Diethyl Ester
CAS No.	691-83-8
Molecular Formula	C9H14O4
Molecular Weight	186.21 g/mol
Synonyms	Diethyl 2-Methylmaleate; Diethyl 2-Methylmaleic Acid Ester; 2-Methylmaleic Acid Diethyl Ester; 2-Methyl-but-2-enedioic acid diethyl ester; Citraconic Acid Diethyl Ester (isomer); Diethyl Citraconate (isomer); 2-Methylfumaric Acid Diethyl Ester (isomer)
EINECS	211-719-7

Quality Control

Our 2-Methylmaleic Acid Diethyl Ester is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including assay, purity, and impurity profile analysis, to ensure it meets exacting standards for research and industrial use. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents, strong bases, and heat sources.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC/HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.440 - 1.450
Density (g/mL, 20°C)	1.05 - 1.10

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