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2-Butenoic acid, 4-oxo-, ethyl ester, also known as ethyl 4-oxo-2-butenoate or ethyl mesaconate, is a chemical compound with the molecular formula C6H8O3. It is an ester derived from 2-butenoic acid and ethanol, characterized by the presence of a 4-oxo (carbonyl) group and a double bond in the 2-position. This organic compound is a colorless liquid with a pungent odor and is soluble in most organic solvents. Ethyl mesaconate is primarily used as a chemical intermediate in the synthesis of various pharmaceuticals, agrochemicals, and other specialty chemicals. It is also employed as a flavoring agent in the food and beverage industry, imparting fruity and ester-like notes to the final product. Due to its reactivity, it is essential to handle 2-Butenoic acid, 4-oxo-, ethyl ester with care, following proper safety protocols.

4038-33-9

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4038-33-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4038-33-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,0,3 and 8 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 4038-33:
(6*4)+(5*0)+(4*3)+(3*8)+(2*3)+(1*3)=69
69 % 10 = 9
So 4038-33-9 is a valid CAS Registry Number.

4038-33-9Relevant academic research and scientific papers

DISSYMETRATION DE LA MOLECULE DU GLYOXAL 1-SYNTHESE ET REACTIVITE DE L'ACETOXY-1 TRIETHOXY-1,2,2 ETHANE

Stambouli, A.,Chastrette, F.,Amouroux, R.,Chastrette, M.,Mattioda, G.,Blanc, A.

, p. 4149 - 4152 (2007/10/02)

Acetoxy-1 triethoxy-1,2,2 ethane, a dissymetric derivative of glyoxal, is prepared and reacted with various bases and nucleophiles, as amines, cyanotrimethylsilane, organometallic and WITTIG reagents.Various acetals are obtained, leading to α-fonctionalized aldehydes.

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