Diisoheptyl phthalate
Diisoheptyl phthalate (CAS 71888-89-6), with the linear formula C6H4-1,2-(CO2C7H15)2 and a molecular weight of 362.50 g/mol, is a chemical compound primarily utilised as a plasticiser. It functions by increasing the plasticity or fluidity of materials, making them easier to process and more flexible after formation. This technical grade ester is an effective additive in various polymer applications, contributing to enhanced material properties.
- Synonyms
- 2-(CO2C7H15)2

Plasticiser
Diisoheptyl phthalate is employed as a plasticiser to impart flexibility and durability to polymeric materials. It effectively reduces the glass transition temperature of polymers, enhancing their processability and performance in various applications.
Polymer Additive
As a polymer additive, this compound enhances the physical properties of plastics. It is integral in the formulation of materials requiring improved elasticity and reduced brittleness, contributing to the longevity and functionality of the final product.
Materials Science Research
In materials science, diisoheptyl phthalate serves as a valuable component in the development and study of novel polymeric materials. Its properties can be leveraged to tailor the characteristics of polymers for specific research or industrial requirements.
| Molecular weight | 362.50 |
|---|---|
| Linear formula | C6H4-1,2-(CO2C7H15)2 |
| Grade | technical grade |
| Density | 0.99 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.486(lit.) |
| Vapour pressure | <5 mmHg (20 °C) |
| Impurities tested | ≤0.6% dioctyl phthalate |
| Composition | ester content, ≥99% (mixture of C7 isomers) |

Hazard statements
- H360D
Precautionary statements
- P201Obtain special instructions before use
- P308IF exposed or concerned
| Water hazard class (WGK, DE) | 1 |
|---|---|
| Hazard codes (EU) | T |
| Risk statements (R) | 61 |
| Safety statements (S) | 53-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Diisoheptyl phthalate used for?
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Diisoheptyl phthalate is primarily used as a plasticiser and polymer additive to enhance the flexibility, durability, and processability of polymeric materials.
What is the CAS number and formula for Diisoheptyl phthalate?
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The CAS number for Diisoheptyl phthalate is 71888-89-6, and its linear formula is C6H4-1,2-(CO2C7H15)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Diisoheptyl phthalate as a technical grade material with an ester content of ≥99% (mixture of C7 isomers).
How should Diisoheptyl phthalate be handled safely?
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Diisoheptyl phthalate is classified as Danger (GHS08) and carries the hazard statement H360D (May damage the unborn child). Handle with extreme caution, ensure adequate ventilation, and use appropriate personal protective equipment. Consult the Safety Data Sheet for comprehensive handling instructions. Pregnant or planning to become pregnant individuals should take particular care. Due to its hazard profile, specific disposal and emergency procedures are critical.
How is Diisoheptyl phthalate packed, shipped, and exported?
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Tech Serve Solutions offers Diisoheptyl phthalate in various pack sizes suitable for laboratory and industrial use, adhering to all relevant shipping and export regulations for chemical substances. Please contact us for specific packaging and logistics information.
How can I request a sample or quote for Diisoheptyl phthalate?
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To request a sample or a quote for Diisoheptyl phthalate, please contact our sales department through the website or by phone, providing your specific requirements.
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