Lanphos TEP 4K is a phosphate ester crafted through polyphosphoric acid, primarily yielding a mono-ester product. Its notable advantage over conventional anionics lies in its outstanding stability in high concentrations of acid, alkali, and electrolyte. Supplied in its neutral form as a potassium salt, Lanphos TEP 4K acts as a hydrotrope, facilitating the solubilization of both anionic and nonionic surfactants into high concentrations of electrolyte.

Chemical Name: Aryl Ether Phosphate (Potassium Salt)

Functions: Surfactant, Surfactant (Anionic)

CAS Number: 36863-52-2

Labeling Claims: Foreign matter-free

Technical Data Sheet

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Identification & Functionality

Cleaning Ingredients Functions

Features & Benefits

Labeling Claims

Applications & Uses


Typical application areas are:

  • Industrial and Institutional cleaning— superior hydrotropic performance compared to sodium xylene sulphonate.
  • Lanphos TEP4K is especially recommended as a hydrotrope for the solubilisation of low foam surfactants into highly built liquids for applications such as bottle washing, low foam alkaline cleaning and liquid machine dishwashing.
  • Metal Cleaning


Physical Form
Clear pale straw liquid free from foreign matter (at 25°C)
Soluble in
Typical Properties
ValueUnitsTest Method / Conditions
Flash Pointmin. 100°CClosed Cup
pH (1% aqueous)7.0 - 7.4--
Pour Point-18.0°C-
Specific Gravity (at 20°C)1.294--
Viscosity (at 25°C)180cP-
ValueUnitsTest Method / Conditions
Active Content65 %
Solid Content64.0 - 66.0%-

Packaging & Availability

Regional Availability
  • Canada
  • Mexico
  • USA
Packaging Information

Lanphos TEP 4K 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 4K in order to prevent corrosion and subsequent contamination.
  • Lanphos TEP 4K can separate on standing and at low temperatures.
  • May require agitation and warming prior to use.