Description

E-4-Methoxy-But-2-Enoic Acid is a high-purity, unsaturated carboxylic acid derivative featuring a methoxy group on the alpha, β-unsaturated system. This compound serves as a versatile and valuable chemical building block for synthesizing more complex molecules in advanced research and industrial applications. It is primarily sought by pharmaceutical intermediates manufacturers and fine chemical producers for its unique reactivity profile.

Application

• Pharmaceutical Intermediate: A key synthon in the production of active pharmaceutical ingredients (APIs), particularly for compounds requiring an alpha, β-unsaturated ester or acid moiety.
• Fine Chemical Synthesis: Used in the manufacture of specialty chemicals, including flavors, fragrances, and advanced polymer precursors.
• Agrochemical Research: Employed as a building block in the development of novel herbicides, fungicides, and plant growth regulators.
• Material Science: Acts as a monomer or cross-linking agent in the synthesis of specialty polymers with tailored properties.
• Academic & R&D: Serves as a standard or starting material in organic chemistry research for studying conjugate addition reactions and heterocyclic chemistry.

Basic Information

Product Name	E-4-Methoxy-But-2-Enoic Acid
CAS No.	75933-65-2
Molecular Formula	C5H8O3
Molecular Weight	116.12 g/mol
Synonyms	(E)-4-Methoxybut-2-enoic acid; trans-4-Methoxy-2-butenoic Acid; 4-Methoxy-trans-crotonic Acid; (E)-4-Methoxy-2-butenoic Acid; 4-Methoxybut-2-enoic acid; (2E)-4-Methoxy-2-butenoic acid; 4-Methoxycrotonic Acid; 75933-65-2
EINECS	Contact for details

Quality Control

Our E-4-Methoxy-But-2-Enoic Acid is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the stringent requirements for fine chemical and pharmaceutical intermediate applications. Certificates of Analysis (COA) documenting identity, purity, and impurity profiles are available upon request to support your quality assurance processes.

Storage

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

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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