Lanphos TEP 4 is a phosphate ester manufactured using polyphosphoric acid, leading to a product consisting predominantly of mono-esters. Its key advantage over conventional anionics is its excellent stability in high concentrations of acid, alkali, and electrolyte. Supplied in acid form, it can be neutralized with various bases to produce a salt. Lanphos TEP4 provides good wetting, detergency, lubricity, and emulsification properties.

Functions: Surfactant, Surfactant (Anionic)

Features: Acid Stable, Electrolyte Stability, Excellent Stability, Good Emulsification Properties, Good Lubricating Properties, Good Wetting Properties, High Alkali Stability, High Detergency

Synonyms: Ethoxylated phenol phosphate, Polyethylene glycol phenyl ether phosphate

Technical Data Sheet

Ask P.A.T. Products Questions

Leo Coyle avatarErik Espling avatarLogan York avatar

Enhanced TDS

Identification & Functionality

Industrial Additives Functions

Features & Benefits

Applications & Uses

  • Lanphos TEP4 is supplied in acid from and can be neutralized with a number of differing bases to produce a salt.
  • Lanphos TEP4 offers good wetting, detergency, lubricity and emulsification properties.


Physical Form
Clear viscous straw liquid free from foreign matter (at 25°C)
Soluble in
Typical Properties
ValueUnitsTest Method / Conditions
Flash Pointmin. 150°CClosed Cup
Pour Point2.0°C-
Specific Gravity (at 20°C)1.285--
Viscosity (at 25°C)7686cP-
ValueUnitsTest Method / Conditions
Acid Value163.0 - 171.0mg KOH/g-
Free Non-ionic Contentmax. 22%-
Water Contentmax. 0.5%-

Regulatory & Compliance

Certifications & Compliance

Packaging & Availability

Regional Availability
  • Canada
  • Mexico
  • USA
Packaging Information

Lanphos TEP 4 can be supplied in bulk road tankers, IBC’s and 200kg nett drums.

Storage & Handling

Storage Conditions
  • Stainless steel, polyethylene or glass lined equipment is necessary for the storage of Lanphos TEP 4 in order to prevent corrosion and subsequent contamination.
  • Lanphos TEP 4 can separate on standing and at low temperatures.
  • May require agitation and warming prior to use.