Hostaphat® 1738

Next generation phosphate ester based on renewable resources

Edition Date :
November 26, 2020

The new Hostaphat 1738 phosphate ester exhibits an excellent low foam profile and strong emulsification properties offering outstanding performance and superior sustainability in metal working fluid formulations. This, along with excellent Extreme Pressure (EP)/Anti-wear (AW) properties makes this multifunctional product an ideal choice to formulate with in semi-synthetic and synthetic fluids.

  • Excellent foam control
  • Favorable hard water stability
  • Comparable tapping torque results to industry standards with higher phosphorus content
  • Lower phosphorus content
  • Excellent emulsification properties
  • Easily neutralizes in amines to form stable synthetic metal working fluids
  • Suggested for use in metal removal and metal forming applications
James Stephens
James Stephens
Contact Person

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Product Function
  • Phosphoric Acid Ester
  • Metal Working
  • Metal Forming Fluids

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Hostaphat® 1738

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Technical Data
 Active content approx. 99 %
 Appearance (20°C) light yellow to amber liquid
 Phosphorus content approx. 2.5 %
 Kinematic viscosity (25 °C) 1290 cSt
 Kinematic viscosity (50 °C) 517 cSt
 Kinematic viscosity (100 °C) 51 cSt
 pH value approx. 3
 Surface Tension (1 g/L, 25 °C) approx. 36 mN/m (as TEA salt)
 Acid Value approx. 65 mg KOH/g
 Density (20°C) approx. 1.02 g/ml
 Pour point approx. 7 °C
 SolubilitySoluble in naphthenic, paraffinic, castor, and canola oils. Also dispersible in water

Metalworking fluids: straight oils, soluble oils, semi-synthetics, and synthetics

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James Stephens
James Stephens
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This information corresponds to the present state of our knowledge and is intended as a general description of our products and their possible applications. Clariant makes no warranties, express or implied, as to the information’s accuracy, adequacy, sufficiency or freedom from defect and assumes no liability in connection with any use of this information. Any user of this product is responsible for determining the suitability of Clariant’s products for its particular application.<br />
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