Chemical products
  • Maleic Acid CAS 110-16-7
  • Maleic Acid CAS 110-16-7

Maleic Acid CAS 110-16-7

Maleic Acid is positioned in industrial supply as a reactive organic acid intermediate, widely used in the production of unsaturated polyester resins, alkyd resins, and various functional materials. Its cis-configuration and double bond structure enable participation in polymerization and modification reactions, making it relevant in coatings, adhesives, and chemical processing systems. Maleic Anhydride is the corresponding anhydride intermediate used where higher reactivity is required in unsaturated polyester and derivative production.

It is typically supplied as a solid material (flakes or crystalline form) suitable for controlled handling in industrial environments. The product is used as a feedstock or formulation component rather than a direct end-use ingredient. Standard export packaging is available, with supporting documentation such as COA, TDS, and SDS provided for procurement and technical evaluation.

  • CAS: 110-16-7
  • Synonyms: Cis-butenedioic acid; Maleinic acid
  • Einecs: 203-742-5
  • Molecular Formula: C₄H₄O₄
  • Grade: Typically supplied for industrial and chemical synthesis use
  • Package: Available in standard export packaging; packaging format arranged according to order quantity and handling requirements
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Product Description

Physicochemical Properties

ItemDescription
AppearanceWhite crystalline solid or flakes
OdorSlight acidic odor
Melting PointApprox. 130–135°C
Boiling PointDecomposes before boiling
SolubilitySoluble in water, ethanol, and acetone
DensityApprox. 1.6 g/cm³
pKaApprox. 1.9 / 6.3
ReactivityContains reactive double bond; participates in polymerization and esterification

Typical Applications

  • Unsaturated polyester resins: Used as a key intermediate in resin synthesis for coatings, composites, and construction materials.
  • Alkyd and specialty resins: Acts as a modifying acid component to introduce unsaturation and improve performance characteristics.
  • Chemical intermediate: Utilized in the production of maleates, fumaric acid derivatives, and other downstream chemicals.
  • Surface treatment and functional chemicals: Applied in formulations where acidity and reactivity are required for modification or stabilization.

Specific end-use applications should be evaluated based on formulation design and regional regulatory requirements.

For related maleic chemistry and unsaturated acid pages, compare Maleic Anhydride, Fumaric Acid, and N-Phenylmaleimide.

Packaging

Maleic Acid is supplied as a solid material and packed in moisture-resistant, sealed packaging to maintain stability during storage and transport. Common formats include multi-layer paper bags with inner liners or fiber drums, suitable for industrial handling.

Packaging is designed to minimize moisture uptake and contamination. Palletized and bulk shipment arrangements can be organized depending on order volume and logistics requirements.

Storage

Store in a cool, dry, and well-ventilated area. Keep containers tightly sealed to prevent moisture absorption and caking. Avoid exposure to direct sunlight, heat sources, and incompatible materials.

Ensure packaging integrity is maintained during storage and transport to preserve product quality.

FAQ - Technical & Supply Chain

  • Q:

    What is Maleic Acid CAS 110-16-7?

    A: Maleic acid is cis-butenedioic acid, an unsaturated dicarboxylic acid with the molecular formula C4H4O4 and molecular weight 116.07 g/mol. It is normally supplied as a white crystalline solid or flakes and is soluble in water, ethanol, and acetone.
  • Q:

    How does Maleic Acid differ from Fumaric Acid?

    A: Maleic acid is the cis isomer of butenedioic acid, while fumaric acid is the trans isomer. The cis configuration makes maleic acid more water-soluble and more reactive in many addition, esterification, and polymerization reactions, and it can be isomerized to fumaric acid under suitable conditions.
  • Q:

    What are the main uses of Maleic Acid?

    A: It is mainly used as a reactive intermediate in unsaturated polyester resins, alkyd and specialty resins, and the production of maleates and fumaric acid derivatives. It is also used in surface treatment formulations, buffers, and other fine-chemical syntheses.
  • Q:

    What grades and specifications are available?

    A: Maleic acid is commonly supplied as industrial or technical grade and higher-purity polymerization or pharmaceutical grade. Commercial specifications often list assay around 99% or higher, with limits on moisture, residue on ignition, and fumaric acid content.
  • Q:

    How should Maleic Acid be stored and handled?

    A: Store it in tightly sealed, moisture-resistant containers in a cool, dry, well-ventilated area. Protect it from moisture, direct sunlight, heat sources, and incompatible materials, and maintain package integrity during transport and handling.

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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