Phosphate Esters

Phosphate esters are anionic surfactants which are produced by phosphation of (ethoxylated) aliphatic or aromatic alcohols.

Phosphate esters are used as emulsifying, corrosion inhibitors and anti-wear additives in metalworking fluids, wetting agents, anti-statics and hydrotropes in cleaning formulations.

By carefully selecting the type of alcohol ethoxylate used and the mono to di-ester ratio the NiPhos multifunctional phosphate esters offer specific advantages including stability over a broad pH range, good solubility, softer soap (scum) deposits and corrosion inhibiting properties.

NiPhos 4000 is a phosphate ester of an oleyl (C18) alcohol plus 5 moles of ethoxylation. It is used as an anionic emulsifier and anti-wear additive in a wide range of industrial formulations. This phosphate ester has improved low temperature properties and reduces the hardness of soap scum deposits in metalworking fluids as compared to the more commonly available oleyl/cetyl based phosphate esters.

NiPhos 4000

PARAMETER Typical
Acid Value  82-92 mg KOH/g 
Appearance Clear to cloudy liquid at 20ºC 
Mono/ diester ratio  1.1 / 1.4 :1
Phosphoric acid  Max. 2% 
Free non-ionic  6% 
Water content  Max. 2% 
Typical Data
CHEMICAL AND PHYSICAL DATA TYPICAL VALUE
Density  1018 kg/m³ at 20°C 
Flash point  > 200°C 
pH  2 - 3 (1% in water) 
Pour point  12°C 
Viscosity  1985 mPas at 20°C 
Active content  100%