mono-Ethyl fumarate
mono-Ethyl fumarate (CAS 2459-05-4), with the linear formula C2H5OCOCH=CHCOOH and a molecular weight of 144.13 g/mol, is a versatile organic building block. This ester of fumaric acid is utilised in chemical synthesis, particularly for the preparation of photo-crosslinkable macromers and complex Ugi/intramolecular Diels-Alder cycloaddition products. Supplied by Tech Serve Solutions at 95% purity, it serves as a valuable intermediate for researchers and industrial chemists.
- IUPAC
- Fumaric acid monoethyl ester,Monoethyl fumarate
- Synonyms
- Fumaric acid monoethyl esterMonoethyl fumarate

Synthesis of Photo-crosslinkable Macromers
mono-Ethyl fumarate serves as a key component in the synthesis of advanced macromers designed for photo-crosslinking applications. This enables the creation of materials with tunable properties responsive to light.
Preparation of Ugi/IMDA Cycloaddition Products
This compound is employed in the intricate synthesis of Ugi/intramolecular Diels-Alder (IMDA) cycloaddition products. These reactions are crucial for building complex molecular architectures in organic chemistry.
Organic Synthesis Intermediate
As an ester of fumaric acid, mono-Ethyl fumarate functions as a valuable intermediate in various organic synthesis pathways. Its structure allows for diverse chemical modifications and constructions.
| Molecular weight | 144.13 |
|---|---|
| Linear formula | C2H5OCOCH=CHCOOH |
| Assay | 95% |
| Boiling point | 147 °C/16 mmHg(lit.) |
| Application | mono-Ethyl fumarate (fumaric acid monoethyl ester, monoethyl fumarate) was used in the preparation of photo-crosslinkable macromers1. It was also used to synthesize Ugi/intramolecular Diels-Alder (IMDA) cycloaddition products2. |
| Melting point | 66-68 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is mono-Ethyl fumarate used for?
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mono-Ethyl fumarate is used as a building block in chemical synthesis, notably for preparing photo-crosslinkable macromers and Ugi/intramolecular Diels-Alder cycloaddition products.
What is the CAS number and chemical formula for mono-Ethyl fumarate?
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The CAS number for mono-Ethyl fumarate is 2459-05-4, and its linear formula is C2H5OCOCH=CHCOOH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies mono-Ethyl fumarate with an assay of 95%. We do not represent this product as USP, BP, or EP grade; it is suitable for technical and research applications.
How should mono-Ethyl fumarate be handled?
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mono-Ethyl fumarate is a warning substance that causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Handle with appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, and gloves, in a well-ventilated area.
Is mono-Ethyl fumarate shipped internationally?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including mono-Ethyl fumarate.
How can I request a sample or quote for mono-Ethyl fumarate?
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Please contact our sales department via the website or direct enquiry channels to request a sample or a quotation for mono-Ethyl fumarate.
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