Diethyl Maleate

About Diethyl Maleate

Diethyl Maleate is an ester carrying the CAS registry number 141-05-9. The compound has the formula C8H12O4, corresponding to a molecular weight of 172.18 g/mol. The IUPAC name is diethyl (Z)-but-2-enedioate. It is also known as Maleic acid, diethyl ester or 2-Butenedioic acid (2Z)-, diethyl ester.

Keep the container tightly sealed and store it in a cool, dry area. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

Key uses span organic synthesis and API synthesis. Typical end-use sectors are pharmaceutical manufacturing and academic and industrial research.

Available in 100 mg, 250 mg, 1 g and 5 g packs, Diethyl Maleate is dispatched with a Certificate of Analysis (COA) to destinations worldwide. SDS and detailed specification sheets can be requested with your quotation.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Diethyl Maleate
Catalogue No.	VQ-049788
CAS Number	141-05-9
IUPAC name	diethyl (Z)-but-2-enedioate
Molecular formula	C₈H₁₂O₄
Molecular weight	172.18 g/mol
Exact mass	172.0736
InChIKey	IEPRKVQEAMIZSS-WAYWQWQTSA-N
SMILES	CCOC(=O)/C=C\C(=O)OCC
PubChem CID	5271566

Physical properties
Physical form	Other
LogP (XLogP3)	0.9
H-bond donors / acceptors	0 / 4
TPSA	52.6 Å²
Synonyms	Maleic acid, diethyl ester, 2-Butenedioic acid (2Z)-, diethyl ester, Diethylester kyseliny maleinove, diethyl maleic acid diester, Maleic acid diethyl ester, 2-Butenedioic acid (Z)-, diethyl ester, Diethyl (Z)-2-butenedioate, diethyl (2Z)-but-2-enedioate, 2-Butenedioic acid, diethyl ester, (Z)-, 2-Butenedioic acid, diethyl ester, (2Z)-, Diethyl (2E)-2-butenedioate

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H317May cause an allergic skin reaction
H319Causes serious eye irritation
H412Harmful to aquatic life with long lasting effects

Precautionary statements: P261, P264 + P265, P272, P273, P280, P302 + P352, P305 + P351 + P338, P321, P333 + P317, P337 + P317, P362 + P364, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Diethyl Maleate?

The CAS Registry Number of Diethyl Maleate is 141-05-9. It is also known as Maleic acid, diethyl ester, 2-Butenedioic acid (2Z)-, diethyl ester, Diethylester kyseliny maleinove.

What is the molecular formula and molecular weight of Diethyl Maleate?

Diethyl Maleate has the molecular formula C8H12O4 and a molecular weight of 172.18 g/mol. Its IUPAC name is diethyl (Z)-but-2-enedioate.

Which grade and pack sizes of Diethyl Maleate can I order?

We supply Diethyl Maleate, in 100 mg, 250 mg, 1 g, 5 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Diethyl Maleate?

Yes. Every lot of Diethyl Maleate is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Diethyl Maleate be shipped internationally?

Yes. Diethyl Maleate is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.