Description

3-Ethylheptyl 4-Methyloctyl Phthalate is a high-molecular-weight phthalate ester plasticizer, a key component in formulating flexible and durable polymer systems. Its primary value lies in its excellent compatibility with PVC and other resins, providing enhanced low-temperature flexibility and processability. This product is essential for manufacturers in the plastics, coatings, and specialty chemical industries seeking reliable performance additives.

Application

• Primary plasticizer for flexible Polyvinyl Chloride (PVC) compounds in wire & cable insulation, flooring, and synthetic leather.
• Secondary plasticizer or co-plasticizer in adhesives, sealants, and specialty polymer blends to modify flexibility and viscosity.
• Functional additive in industrial coatings and inks to improve film formation and durability.
• Processing aid in the manufacture of rubber and elastomeric products.
• Solvent and carrier fluid in specialty lubricant and hydraulic fluid formulations.
• Intermediate in the synthesis of more complex ester-based chemicals and polymers.

Basic Information

Product Name	3-Ethylheptyl 4-Methyloctyl Phthalate
CAS No.	85851-79-2
Molecular Formula	C34H58O4
Molecular Weight	530.82 g/mol
Synonyms	Bis(3-ethylheptyl) 4-methyloctyl phthalate; 1,2-Benzenedicarboxylic acid, bis(3-ethylheptyl) 4-methyloctyl ester; Phthalic acid, bis(3-ethylheptyl) 4-methyloctyl ester; DI(3-ethylheptyl) 4-methyloctyl phthalate; Plasticizer EHMP; 3-Ethylheptyl 4-methyloctyl ester of phthalic acid; Mixed branched-chain alkyl phthalate ester
EINECS	Contact for details

Quality Control

Our 3-Ethylheptyl 4-Methyloctyl Phthalate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity, performance, and compliance with agreed specifications. A comprehensive Certificate of Analysis (COA) detailing assay, identity, and impurity profiles is provided with every shipment to guarantee traceability and quality assurance for your production processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong acids and oxidizing agents. Recommended storage temperature is between 15°C and 25°C (59°F and 77°F). Keep container tightly sealed when not in use to minimize moisture absorption and contamination.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.5%
Acidity (as Phthalic Acid)	≤ 0.05%
Water Content (KF)	≤ 0.1%
Color (APHA)	≤ 50
Specific Gravity (20°C)	0.970 - 0.990
Refractive Index (20°C)	1.480 - 1.490

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