What is Itaconic Acid CAS 97-65-4?

Itaconic Acid is an unsaturated dicarboxylic acid with the IUPAC name 2-methylidenebutanedioic acid. It has the molecular formula C5H6O4 and a molecular weight of 130.10 g/mol, and it is commonly described as methylenesuccinic acid.

What are the main physical properties of Itaconic Acid?

Itaconic Acid is normally a white crystalline solid or powder. Reported melting points are usually in the range of 162-168 °C, the density is about 1.6 g/cm3, and the first pKa is about 3.85 at 25 °C. It is readily soluble in water and ethanol.

Why is Itaconic Acid used as a functional monomer?

The molecule contains both an exocyclic carbon-carbon double bond and two carboxylic acid groups. This reactive structure allows it to copolymerize with acrylates, methacrylates, acrylonitrile, and other unsaturated monomers, and to introduce carboxyl functionality into resins, latex systems, coatings, and specialty polymers.

What is the difference between Itaconic Acid, citraconic acid, and mesaconic acid?

All three are unsaturated dicarboxylic acid isomers with the same molecular formula, but they differ in the position or geometry of the double bond. Itaconic Acid has a methylene group attached to the carbon bearing one carboxyl group, which gives it different reactivity and makes it especially useful as a co-monomer.

Is Itaconic Acid available as a bio-based chemical?

Yes. Itaconic Acid is produced industrially by fermentation, notably using Aspergillus terreus, and is considered an important bio-based platform chemical. This makes it attractive for renewable polymer and specialty chemical development when the production route and grade are confirmed with the supplier.

What should be confirmed when sourcing industrial-grade Itaconic Acid?

Buyers should confirm purity or assay, appearance, moisture, color, particle or crystalline form, and any application-specific residual or trace requirements. Because polymer performance can be sensitive to impurities, the selected grade should be evaluated against the intended polymerization or synthesis process.

Itaconic Acid CAS 97-65-4

Itaconic Acid CAS 97-65-4 is an industrial dicarboxylic acid used as a functional monomer and chemical intermediate in polymers, resins, coatings, adhesives, and specialty formulations. we supplies Itaconic Acid for industrial sourcing needs with specification review, packaging discussion, and export-oriented supply support. Maleic Anhydride is a related unsaturated intermediate to compare where an anhydride route is required in resin or polymer modification.

CAS: 97-65-4
Synonyms: Itaconic Acid; Methylenesuccinic Acid; 2-Methylenesuccinic Acid; 2-Methylidenebutanedioic Acid
Einecs: 202-599-6
Molecular Formula: C5H6O4
Grade: Industrial Grade / Chemical Synthesis Grade / Polymer Application Grade
Package: Standard export packaging; bag or drum packaging can be arranged according to supply specification and order requirements

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Product Description

1 Introduction

2 Main Applications

3 Product Specifications

4 Packaging and Supply

5 Storage and Handling

Introduction

Itaconic Acid CAS 97-65-4 is an unsaturated dicarboxylic acid used as a chemical intermediate and functional monomer in industrial production. It is valued by buyers who need a reactive raw material for polymer modification, resin synthesis, latex systems, coatings, plastics, and specialty chemical applications.

Main Applications

Polymer and resin production: Used as a functional monomer or co-monomer in selected polymer systems, resin modification, and specialty polymer development.
Coatings and latex systems: Suitable for industrial formulations where carboxyl functionality and polymer modification performance are required.
Plastics and synthetic materials: Applied in certain plastic, fiber, and synthetic material production routes depending on formulation design.
Adhesives and binders: May be used in systems where polymer structure, adhesion, or formulation properties need adjustment.
Specialty chemical synthesis: Used as an intermediate for producing derivatives, esters, and other downstream specialty chemicals.

Product Specifications

The following information is provided for product identification and sourcing discussion. Final specifications should be confirmed according to the current batch COA or agreed supply standard.

Product Name	Itaconic Acid
CAS Number	97-65-4
Synonyms	Methylenesuccinic Acid; 2-Methylenesuccinic Acid
Molecular Formula	C5H6O4
Molecular Weight	130.10
Product Type	Industrial Chemical Intermediate / Functional Monomer
Typical Appearance	White crystalline solid or powder
Specification	Available according to supplier grade and batch COA
Documents	COA, TDS, and SDS can be provided upon request where applicable

Packaging and Supply

Itaconic Acid is available for industrial supply in suitable chemical packaging based on order quantity, shipment requirements, and buyer handling needs. Packaging details can be confirmed during quotation according to the selected grade and destination market.

For bulk or regular procurement, buyers may request current specification details, available packaging options, batch documentation, and export shipping support before placing an order.

Storage and Handling

Store Itaconic Acid in tightly closed packaging in a cool, dry, and well-ventilated area. Keep the material away from moisture, incompatible substances, excessive heat, and direct exposure during storage and handling.

Operators should follow the product SDS and local workplace handling procedures. Appropriate protective equipment and good industrial hygiene practices are recommended when handling chemical raw materials.

FAQ - Technical & Supply Chain

Q:
What is Itaconic Acid CAS 97-65-4?

A: Itaconic Acid is an unsaturated dicarboxylic acid with the IUPAC name 2-methylidenebutanedioic acid. It has the molecular formula C5H6O4 and a molecular weight of 130.10 g/mol, and it is commonly described as methylenesuccinic acid.
Q:
What are the main physical properties of Itaconic Acid?

A: Itaconic Acid is normally a white crystalline solid or powder. Reported melting points are usually in the range of 162-168 °C, the density is about 1.6 g/cm3, and the first pKa is about 3.85 at 25 °C. It is readily soluble in water and ethanol.
Q:
Why is Itaconic Acid used as a functional monomer?

A: The molecule contains both an exocyclic carbon-carbon double bond and two carboxylic acid groups. This reactive structure allows it to copolymerize with acrylates, methacrylates, acrylonitrile, and other unsaturated monomers, and to introduce carboxyl functionality into resins, latex systems, coatings, and specialty polymers.
Q:
What is the difference between Itaconic Acid, citraconic acid, and mesaconic acid?

A: All three are unsaturated dicarboxylic acid isomers with the same molecular formula, but they differ in the position or geometry of the double bond. Itaconic Acid has a methylene group attached to the carbon bearing one carboxyl group, which gives it different reactivity and makes it especially useful as a co-monomer.
Q:
Is Itaconic Acid available as a bio-based chemical?

A: Yes. Itaconic Acid is produced industrially by fermentation, notably using Aspergillus terreus, and is considered an important bio-based platform chemical. This makes it attractive for renewable polymer and specialty chemical development when the production route and grade are confirmed with the supplier.
Q:
What should be confirmed when sourcing industrial-grade Itaconic Acid?

A: Buyers should confirm purity or assay, appearance, moisture, color, particle or crystalline form, and any application-specific residual or trace requirements. Because polymer performance can be sensitive to impurities, the selected grade should be evaluated against the intended polymerization or synthesis process.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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