Tris(2-ethylhexyl) Phosphate (TOP) is a colorless, odorless, high-boiling organophosphate ester widely recognized as one of the most effective flame-retardant and low-temperature plasticizers for PVC, cellulose derivatives, and synthetic rubbers. TOP combines excellent plasticizing efficiency with strong flame-retardant properties (phosphorus-based) and outstanding cold flexibility performance, making it ideal for applications requiring both fire safety and pliability in extreme environments.
TOP is non-halogenated, low-smoke, and exhibits extremely low volatility and migration.

 

Technical Specifications

ITEMS SPECIFICATIONS
Appearance Transparent, oily liquid with no visible impurities
Content (GC) ≥99.0%
Dioctyl phosphate content (GC) ≤0.2%
Octanol content (GC) ≤0.15%
Surface tension,mN/m (20-25℃) ≥18
Acid value, mgKOH/g ≤0.2
Colourity (Pt-Co) ≤30
Density, g/mL 0.921-0.927
Water content ≤0.2%
Viscosity (cp)25℃mm2/s ≤20

 

Packaging and Storage

  • Net weight 180kg iron drum or 1000kg IBC drum.
  • Stored at dry, shady, ventilated place. Prevented from collision and sunrays, rain-attack during handling and shipping.

 

Key Advantages of Tris(2-ethylhexyl) Phosphate (TOP)

  • Strong flame-retardant performance (LOI increase up to 28–32% in flexible PVC)
  • Excellent low-temperature flexibility (down to -70°C)
  • Very low volatility and migration resistance
  • Good hydrolysis stability and electrical insulation properties
  • Compatible with PVC, PVAc, nitrocellulose, ethyl cellulose, PMMA, and most synthetic rubbers
  • Low smoke generation compared to halogenated systems
  • Non-toxic profile suitable for many regulated applications

 

Primary Applications of Tris(2-ethylhexyl) Phosphate (TOP)

  • Flame-retardant flexible PVC cables and wire insulation (UL 90°C, 105°C, low-smoke zero-halogen compounds)
  • Anti-static and flame-retardant conveyor belts
  • PVC leather cloth and tarpaulins
  • Cellulose acetate films and sheets
  • Vinyl flooring and wall coverings
  • Hydraulic fluids and lubricants (anti-wear additive)
  • Extraction solvent in nuclear and pharmaceutical industries

 

Frequently Asked Questions (FAQs)

Is TOP a flame retardant or just a plasticizer?
TOP is both. It acts as a highly efficient primary plasticizer while simultaneously providing strong phosphorus-based flame retardancy and smoke suppression.

How does TOP compare with other phosphate plasticizers like TPP, TCPP, or TCEP?
TOP has significantly better low-temperature performance (-70°C vs -20°C to -40°C for most others), much lower volatility, and superior hydrolysis resistance, making it preferred for outdoor and long-life applications.

Is TOP considered phthalate-free?
Yes, TOP is completely phthalate-free and is often used as a safer alternative to DOP/DEHP in flame-retardant formulations.

Can TOP be used in food-contact applications?
Standard TOP is not approved for direct food contact. For food-contact requirements, alternative plasticizers such as DOA or ATBC should be considered.

 

Where can I buy high-quality Tris(2-ethylhexyl) Phosphate (TOP)?

You can contact us via email [email protected] for offers and bulk orders.