Description

Monoethyl Fumarate is the monoethyl ester of fumaric acid, a high-purity intermediate with significant commercial utility. This compound is valued for its role as a versatile building block in organic synthesis and polymer chemistry. It is primarily sought by manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries for producing active ingredients, cross-linking agents, and functional monomers.

Application

• Pharmaceutical Intermediate: A key synthon in the production of active pharmaceutical ingredients (APIs), particularly for compounds with fumarate ester functionalities.
• Polymer & Resin Modifier: Used as a co-monomer or cross-linking agent in unsaturated polyester resins and specialty polymers to enhance properties.
• Agrochemical Synthesis: Serves as a precursor in the manufacture of certain herbicides, fungicides, and plant growth regulators.
• Organic Synthesis Building Block: Employed in Michael additions, esterifications, and other reactions to introduce the fumarate moiety into target molecules.
• Food & Beverage Additive Precursor: Used in the synthesis of derivatives that may serve as acidulants or flavor enhancers.
• Cosmetic Ingredient Intermediate: A starting material for synthesizing esters used in skincare and cosmetic formulations.

Basic Information

Product Name	Monoethyl Fumarate
CAS No.	245-95-4
Molecular Formula	C6H8O4
Molecular Weight	144.13 g/mol
Synonyms	Ethyl hydrogen fumarate; Monoethyl fumaric acid; Fumaric acid monoethyl ester; 2-Butenedioic acid (2E)-, monoethyl ester; Ethyl fumarate (monoester); FEMA 3680; NSC 404058; EINECS 246-158-7
EINECS	246-158-7

Quality Control

Our Monoethyl Fumarate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including assay, identification, and impurity profiling, to ensure it meets the high standards required for industrial and fine chemical applications. Certificates of Analysis (COA) documenting purity, physical characteristics, and safety data 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 at room temperature (15-25°C). Keep away from strong oxidizing agents, strong bases, and heat sources.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	68°C - 72°C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Residual Solvents (GC)	Meets ICH Q3C guidelines

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