Description

2-Butenoic Acid, 3-Hydroxy-, Methyl Ester, (E)- (9Ci) is a high-purity chemical intermediate, also known as methyl (E)-3-hydroxycrotonate. This compound is valued for its role as a versatile building block in organic synthesis, offering a reactive α,β-unsaturated ester moiety with a hydroxyl group. It is primarily sought after by research and development laboratories and industrial manufacturers in the pharmaceutical and fine chemical sectors for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: A key synthon in the synthesis of active pharmaceutical ingredients (APIs), particularly for molecules containing β-hydroxy ester functionalities.
• Fine Chemical Synthesis: Used in the production of specialty chemicals, flavors, and fragrances where precise stereochemistry is required.
• Agrochemical Research: Serves as a precursor in developing novel crop protection agents and herbicides.
• Polymer Chemistry: Acts as a monomer or co-monomer for creating specialized polymers with tailored properties.
• Academic & Industrial R&D: Employed in methodological development and as a standard in chemical research.

Basic Information

Product Name	2-Butenoic Acid, 3-Hydroxy-, Methyl Ester, (E)- (9Ci)
CAS No.	4525-24-0
Molecular Formula	C5H8O3
Molecular Weight	116.12 g/mol
Synonyms	Methyl (E)-3-hydroxycrotonate; (E)-Methyl 3-hydroxy-2-butenoate; Methyl trans-3-hydroxycrotonate; 3-Hydroxycrotonic acid methyl ester; 2-Butenoic acid, 3-hydroxy-, methyl ester, (E)-; Methyl β-hydroxycrotonate; trans-Methyl 3-hydroxy-2-butenoate; 4525-24-0
EINECS	Contact for details

Quality Control

Our 2-Butenoic Acid, 3-Hydroxy-, Methyl Ester, (E)- (9Ci) is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing, including chromatography (HPLC/GC) and spectroscopic methods (IR, NMR), to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting all critical parameters are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and organic solvents. Recommended storage temperature is between 15°C and 25°C. The container must be kept tightly sealed to maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Isomeric Purity (GC)	≥ 98.0% (E)-isomer
Water Content (KF)	≤ 0.5%

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