In the fields of high-precision polymer compounding, cellular resin processing, and fine chemical formulation, achieving high-efficiency matrix wetting and superior melt lubrication is critical. Diethyl Phthalate (universally designated in commercial chemical sourcing networks as DEP) stands as a premium short-chain phthalate plasticizer. Chemically defined as Diethyl benzene-1,2-dicarboxylate (CAS No. 84-66-2), DEP presents as a water-white, completely clear, and virtually odorless oily liquid. Possessing powerful thermodynamic compatibility with polar polymers, DEP acts as an elite softening agent and polymer processing aid, significantly decreasing compound viscosity during high-shear operations and improving the final elastic modulus and tensile stamina of technical goods.
Technical Product Specifications
| Property / Parameter | Standard Specification (Premium Grade) |
|---|---|
| Chemical Name | Diethyl Phthalate (DEP) |
| CAS Number | 84-66-2 |
| Molecular Formula | C12H14O4 |
| Ester Purity / Active Content (%) | ≥ 99.5% |
| Color (APHA / Pt-Co) | ≤ 15 max |
| Density (g/cm³ at 20°C) | 1.118 – 1.122 g/cm³ |
| Moisture / Water Content (%) | ≤ 0.15% |
| Refractive Index (nD20) | 1.500 – 1.505 |
Why Choose Our DEP Plasticizer?
- ✓ Outstanding Molecular Solvation: Possesses brilliant affinity for highly polar polymer chains like Cellulose Acetate (CA), generating exceptionally uniform resin melt textures and crystal-clear film clarity.
- ✓ Optimized Melt Lubrication: Lowers the composite internal friction barriers of rubber masterbatches, dramatically reducing mixing time, energy configurations, and high-heat compound stress during manufacturing.
- ✓ Odourless Fragrance Fixative Capability: Due to its stable chemical structure and excellent compatibility, it serves as a high-performance, odor-neutral fixative and carrier solvent in fine fragrances and cosmetic polymer products.
Primary Applications
Plasticizer DEP is universally implemented across cellulosic resins, specialty rubber compounding, and fine chemical formulation frameworks:
Cellulose Acetate Engineering
The industry-standard softening plasticizer for manufacturing premium optical tool handles, high-clarity sheets, flexible film wrappers, and cellulose-base plastics.
Specialty Elastomer Processing
Utilized in highly polar elastomers like Nitrile (NBR) and Polyurethane (PU) to adjust green compound tackiness, enhance flow properties, and lower extrusion pressure.
Fragrance & Coating Vehicles
Acts as an odorless solvent carrier and fragrance fixative in perfume matrices, and functions as an excellent fluidizing modifier in polar varnishes and lacquers.
⚠ Storage & Handling Guidelines
Maintaining proper warehouse environment control parameters is vital to protect the high active purity, low acid value, and water-white clarity of Diethyl Phthalate (DEP). Although it exhibits excellent chemical stability under ambient conditions, its low molecular weight structure makes it slightly sensitive to ambient moisture pickup, which can induce slow hydrolysis over prolonged storage.
- • Warehouse Climate Control: Store all liquid drums, IBC totes, or bulk storage containers in a thoroughly dry, cool, and well-ventilated dedicated warehouse location. Ensure all inventory remains fully isolated from direct solar radiation, high-heat sources, and open flames.
- • Airtight Sealing Management: Ensure all container bungs, valves, and caps are tightly resealed immediately after any sampling or dispensing operations. Keeping containers hermetically sealed prevents humidity absorption and safeguards the electrical insulation performance of the ester.
- • Shelf Life & Rotation Strategy: Under clean, temperature-controlled, and sealed environment parameters, our premium DEP plasticizer carries a certified shelf life of 24 months from the date of manufacture. Adhering to a strict First-In, First-Out (FIFO) material rotation system is recommended.
Frequently Asked Questions
What makes Diethyl Phthalate (DEP) uniquely suited for cellulose acetate plastics? +
Does DEP cause any vulcanization or curing interference in specialty rubbers? +
Why is DEP widely used as a fixative carrier in the fragrance and cosmetic industries? +
What is the typical dosage range for DEP inside rubber and vinyl formulations? +
Partner with a Reliable Chemical Supplier
We provide premium-grade Diethyl Phthalate (DEP) plasticizer carefully processed to meet international technical benchmarks. Available in high-purity liquid drums, IBC totes, and bulk ISO tanks to ensure absolute processing precision inside your polymer mixing environment.
