Description

Hexadecyl Octadecyl Phthalate is a high-molecular-weight diester plasticizer derived from phthalic anhydride and a blend of C16 and C18 alcohols. This compound is valued for its excellent permanence, low volatility, and ability to impart flexibility and durability to polymer matrices. It is a critical material for manufacturers in the plastics, coatings, and specialty chemical industries seeking reliable performance in demanding applications.

Application

• Primary Plasticizer for PVC and other Polymers: Imparts excellent flexibility, low-temperature performance, and resistance to extraction in vinyl compounds, cables, hoses, and films.
• Specialty Coating Formulations: Used as a polymeric plasticizer to enhance film formation, adhesion, and durability in industrial and protective coatings.
• Sealant and Adhesive Production: Provides lasting flexibility and reduces migration in polysulfide, polyurethane, and other elastomeric sealants and adhesives.
• Wire and Cable Insulation: Offers good electrical properties and long-term aging resistance for insulating and jacketing compounds.
• Printing Inks and Pigment Dispersions: Acts as a resin modifier and carrier to improve flow, gloss, and substrate adhesion.
• Lubricant and Functional Fluid Additive: Serves as a base or additive in synthetic lubricants and greases for its viscosity and stability properties.

Basic Information

Item	Detail
Product Name	Hexadecyl Octadecyl Phthalate
CAS No.	64084-40-8
Molecular Formula	C52H94O4
Molecular Weight	783.3 g/mol
Synonyms	Dioctyl Phthalate (C16-C18 blend); Dihexadecyl Octadecyl Phthalate; Phthalic Acid, Dihexadecyl Octadecyl Ester; 1-Hexadecyl 2-Octadecyl Phthalate; C16-C18 Alkyl Phthalate; DOP (C16-C18); Plasticizer DOP (C16-C18); High Molecular Weight Phthalate Ester
EINECS	Contact for details

Quality Control

Our Hexadecyl Octadecyl Phthalate is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure consistent purity, performance, and compliance with relevant industry specifications. A Certificate of Analysis (COA) documenting key parameters such as assay, color, acidity, and moisture content is provided with each shipment.

Storage

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

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (APHA)	≤ 50
Assay (GC)	≥ 99.0%
Acidity (as Phthalic Acid)	≤ 0.01%
Moisture (KF)	≤ 0.05%
Specific Gravity (20°C)	0.970 - 0.980
Refractive Index (20°C)	1.483 - 1.487
Viscosity (25°C)	Contact for details

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