Lanphos TEP4K

Product Category: Anionics

Phenol + 4EO Phosphate Ester - Potassium Salt

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A very effective hydrotrope for low to medium alkaline formulations, and will help to solubilise conventional surfactants in these conditions. In high alkaline systems micelles are formed and surface activity becomes more enhanced.

Key Properties

  • Does not change the foaming, wetting of other surfactants in formulations

  • Hydrotrope to improve the solubility of nonionic and anionic surfactants

  • High Acid, Alkali and Electrolyte stability

  • Compatible with high levels of inorganic builders such as sodium potassium hydroxide, silicates, phosphates and polyphosphates

  • Becomes surface active in highly alkali formulations: See Blog

Lanphos TEP4K isn't surface active at low alkaline levels as its unable to form micelles. This can be shown by the wetting profile below

Wetting draves 0.5g/​l


However as you increase the pH then the product becomes more surface active and temperature increases can also enhance the surface activity.

More details view the blog:  A Surfactant for highly alkaline formulations


  • Household general purpose cleaner

  • Industrial and institutional cleaning

  • Carpet cleaner

  • Powerful hydrotrope

  • Metal cleaning


Appearance @ 25°C

Clear pale straw liquid free from foreign matter

Solids content %

64.0 - 66.0

pH (1% aqueous)

7.0 - 7.4

Typical Properties





Solubility in water