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Technical Specifications | |
Parameter | Specification |
Product Name | Dioctyl Phthalate (DOP) |
Synonym | Bis(2-ethylhexyl) phthalate; DEHP; DOP oil |
CAS Number | 117-81-7 |
EINECS Number | 204-211-0 |
Molecular Formula | C₂₄H₃₈O₄ |
Molecular Weight | 390.30 g/mol |
Ester Content (wt%) | ≥99.5% (Min) |
Grade | Industrial Grade / General-Purpose Grade |
Appearance | Colorless transparent oily liquid, free of visible impurities |
Color (APHA, Pt-Co) | ≤30 |
Density (20°C) | 0.982–0.988 g/cm³ |
Acid Value (mg KOH/g) | ≤0.01 |
Moisture Content | ≤0.05 wt% |
Volume Resistivity | ≥1 × 10⁹ Ω·m |
Refractive Index (25°C) | 1.484 ± 0.005 |
Flash Point (COC) | ≥210°C |
Heat Loss (125°C, 3h) | ≤0.2 wt% |
Viscosity (mPa·s, 20°C) | 78–82 |
Packaging Options | 200L Iron Drums (200 kg net), 1000L IBC Totes (1000 kg net), ISO Flexitanks (23 MT), Bulk Vessel |
Primary Applications |
Dioctyl Phthalate CAS 117-81-7 is the benchmark general-purpose plasticizer with a versatile application profile spanning multiple polymer systems and industrial sectors. Its balanced cost-performance characteristics make it indispensable across the following applications: |
PVC Resin Processing: The dominant application. DOP imparts flexibility, elasticity, and durability to PVC resins used in films, sheets, hoses, profiles, extruded products, and calendered goods. Typical loading ranges from 30–60 PHR depending on desired Shore hardness and end-use flexibility requirements. Its high plasticizing efficiency allows compounders to achieve target flexibility at competitive dosage levels. |
Chemical Fiber Resin: Functions as a processing aid and flexibility modifier in chemical fiber production, improving spinnability and end-fiber mechanical properties where plasticized fiber grades are specified. |
Acetate Resin Compounds: Provides plasticization for cellulose acetate and related acetate resin systems, enhancing flexibility and impact resistance in molded and extruded acetate products. |
ABS Resin Modification: Acts as a secondary plasticizer or processing aid in ABS compounds, improving melt flow characteristics and impact performance in injection molding and extrusion applications. |
Rubber Processing: Serves as a plasticizer and processing aid in natural rubber (NR), styrene-butadiene rubber (SBR), nitrile rubber (NBR), and chloroprene rubber (CR) formulations. DOP improves compound processability, filler dispersion, and end-product flexibility without adversely affecting vulcanization behavior. |
Paint and Coating Formulations: Used as a plasticizing co-solvent and film-forming agent in industrial coatings, improving film flexibility, adhesion, and durability. DOP's compatibility with a wide range of resin binders makes it versatile across solvent-borne and high-solids coating systems. |
Dye and Pigment Dispersions: Functions as a carrier and dispersant for organic pigments and dyes in masterbatch, color concentrate, and printing ink formulations, ensuring uniform color development and dispersion stability. |
