Description

Epoxidized Soybean Oil (ESO) is a versatile bio-based plasticizer and stabilizer derived from renewable soybean oil. It is a critical additive that enhances the flexibility, durability, and thermal stability of polymer formulations while offering a more sustainable alternative to traditional phthalates. This high-performance epoxide is essential for manufacturers in the plastics, coatings, and rubber industries seeking to improve product performance and meet evolving regulatory and environmental standards.

Application

• Primary plasticizer and secondary stabilizer for Polyvinyl Chloride (PVC) products, including cables, flooring, films, and synthetic leather.
• Effective stabilizer for chlorinated polymers, scavenging hydrochloric acid (HCl) generated during thermal degradation to prevent polymer chain breakdown.
• Key modifier in flexible and rigid PVC formulations to improve low-temperature flexibility and heat stability.
• Bio-based additive in adhesives, sealants, and coatings to enhance flexibility and adhesion properties.
• Component in lubricants and functional fluids as a viscosity modifier and tackifier.
• Used as a reactive diluent and intermediate in the synthesis of polyols, resins, and other specialty chemicals.
• Plasticizer for nitrile rubber and other elastomers to improve processing and performance characteristics.

Basic Information

Product Name	Epoxidized Soybean Oil
CAS No.	91722-14-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	ESO; Soybean oil, epoxidized; Epoxy soybean oil; 2,3-Epoxypropyl ester of soybean oil; Soybean oil epoxide; Plasticizer ESO; Stabilizer ESO; Vinyl plasticizer ESO
EINECS	294-426-7

Quality Control

Our Epoxidized Soybean Oil is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for oxirane oxygen content, iodine value, acidity, and color. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat sources and incompatible materials such as strong acids and organic solvents. Recommended storage temperature is between 15°C and 25°C (59°F and 77°F).

Specification

Item	Specification
Appearance	Clear pale yellow viscous liquid
Oxirane Oxygen Content	≥ 6.0 %
Iodine Value (IV)	≤ 6.0 g I₂/100g
Acidity (as Oleic Acid)	≤ 1.0 %
Moisture Content	≤ 0.3 %
Color (Gardner)	≤ 5
Refractive Index (n20D)	1.470 - 1.475
Specific Gravity (25°C)	0.985 - 1.000

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