Description

Isocrotonic Acid CAS NO 503-64-0 is an unsaturated carboxylic acid and an isomer of crotonic acid, characterized by its reactive double bond and carboxylic acid functionality. This compound serves as a versatile chemical intermediate and building block for synthesizing more complex molecules in fine chemical and pharmaceutical production. It is primarily needed by manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries for research, development, and commercial synthesis.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and other drug candidates.
• Agrochemical Synthesis: Serves as a key precursor for manufacturing certain herbicides, fungicides, and plant growth regulators.
• Polymer Modification: Acts as a comonomer or cross-linking agent in the production of specialty polymers, resins, and coatings to modify properties like flexibility and adhesion.
• Fine Chemical Production: Employed in organic synthesis for creating flavors, fragrances, and other high-value chemical products.
• Research & Development: Utilized in academic and industrial laboratories for chemical research and process development.
• Chemical Synthesis: Functions as a starting material or intermediate for various organic transformations, including esterifications and Michael additions.

Basic Information

Product Name	Isocrotonic Acid
CAS No.	503-64-0
Molecular Formula	C4H6O2
Molecular Weight	86.09 g/mol
Synonyms	(E)-2-Butenoic Acid; trans-2-Butenoic Acid; (E)-Crotonic Acid; trans-Crotonic Acid; 2-Butenoic Acid, (E)-; Isocrotonic Acid; β-trans-Crotonic Acid; Crotonic Acid (trans-); 3-Methylacrylic Acid; Tiglidic Acid (related isomer)
EINECS	207-964-3

Quality Control

Our Isocrotonic Acid is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets high-purity standards and consistent specifications for industrial and research use. Certificates of Analysis (COA) documenting purity, identity, and impurity profiles are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its properties of being easily oxidized (store under inert atmosphere) and light-sensitive, prolonged exposure to air, heat, or light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	71 - 74 °C
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%

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