Description

(Z)-2-Pentenoic Acid CAS NO 16666-42-5 is a high-purity unsaturated carboxylic acid that serves as a versatile chiral building block and intermediate in advanced organic synthesis. Its defined stereochemistry and reactive alkene-carboxylic acid functionality make it a critical component for producing fine chemicals and active pharmaceutical ingredients (APIs). This compound is essential for research and manufacturing in the pharmaceutical, agrochemical, and specialty chemical industries.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the synthesis of prostaglandins, other bioactive molecules, and complex drug candidates.
• Agrochemical Synthesis: Used in the production of advanced pesticides, herbicides, and plant growth regulators.
• Flavor & Fragrance Ingredient: Serves as a precursor for esters and lactones that contribute to specific flavor and aroma profiles.
• Polymer & Resin Modifier: Acts as a monomer or co-monomer to introduce unsaturation and carboxylic acid groups into polymer chains, modifying properties.
• Organic Synthesis Reagent: Employed in various name reactions, including Michael additions, Diels-Alder reactions, and asymmetric hydrogenations.
• Liquid Crystal & Electronic Chemical Intermediate: Used in the synthesis of advanced materials for display and electronic applications.

Basic Information

Product Name	(Z)-2-Pentenoic Acid
CAS No.	16666-42-5
Molecular Formula	C5H8O2
Molecular Weight	100.12 g/mol
Synonyms	(Z)-2-Pentenoic Acid; (Z)-Pent-2-enoic Acid; cis-2-Pentenoic Acid; cis-Pent-2-enoic Acid; (2Z)-2-Pentenoic Acid; 2-Pentenoic Acid, (Z)-; trans-2-Pentenoic Acid Isomer; β-Methylcrotonic Acid (related); 2-Pentenoic Acid
EINECS	240-733-8

Quality Control

Our (Z)-2-Pentenoic Acid is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including chiral purity analysis by HPLC and GC, to ensure it meets the high standards required for pharmaceutical and fine chemical applications. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from strong bases, oxidizing agents, and sources of ignition. Due to its acidic nature, ensure containers are made of compatible materials and are properly sealed.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Chiral Purity (GC/HPLC)	≥ 99.0% (Z)-isomer
Water Content (KF)	≤ 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.