Description

Di-n-Heptyl Phthalate is a high-purity diester of phthalic acid, serving as a specialized plasticizer and chemical intermediate. This compound is valued for its ability to impart specific flexibility, durability, and performance characteristics to polymer matrices. It is primarily required by manufacturers in the plastics, coatings, and specialty chemical industries seeking tailored additive solutions for high-performance applications.

Application

• Primary Plasticizer for PVC, polyvinyl butyral (PVB), and other synthetic resins to modify flexibility and workability.
• Functional Additive in specialty adhesives, sealants, and caulks to enhance elongation and low-temperature performance.
• Coalescing Agent & Solvent in industrial coating formulations and ink systems.
• Chemical Intermediate for the synthesis of more complex esters, lubricants, and surfactants.
• Dielectric Fluid component in specialized capacitor and electrical insulation applications.
• Laboratory Reagent and reference standard for analytical and research purposes.

Basic Information

Product Name	Di-n-Heptyl Phthalate
CAS No.	3648-21-3
Molecular Formula	C22H34O4
Molecular Weight	362.50 g/mol
Synonyms	1,2-Benzenedicarboxylic acid, diheptyl ester; Diheptyl phthalate; DHP; n-Heptyl phthalate; Phthalic acid, diheptyl ester; DNHP; Di-n-heptyl benzene-1,2-dicarboxylate
EINECS	222-885-1

Quality Control

Our Di-n-Heptyl Phthalate is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, identity, and key parameters is provided to guarantee consistency and support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat, sparks, and open flame. For long-term storage, consider under an inert atmosphere to maintain optimal purity.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Acidity (as Phthalic Acid)	≤ 0.05%
Water Content (KF)	≤ 0.1%
Refractive Index (20°C)	1.483 - 1.487
Density (20°C)	0.990 - 1.010 g/mL

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