DePHOS™ HP-739 is a high-phosphorus-content anionic phosphate ester supplied in its free acid form. It is recommended as an extreme pressure additive, lubricant, and corrosion inhibitor in metalworking applications. The product is high foaming when neutralized and belongs to the organophosphates and phosphate ester family. Please submit a document request or general inquiry form if you’d like to access an SDS in another language.

Chemical Family: Organophosphates, Phosphate Esters, Phosphorous-based Compounds

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Technical Data

Identification & Functionality

Features & Benefits

Fluids & Lubricants Features
Product Features
  • Low foam in free acid form
  • Moderate to high foam when neutralized to pH ≥ 7.5
  • Excellent wetting
  • Emulsifier
  • Lubrication
  • Extreme pressure properties
  • Corrosion inhibitor

Applications & Uses

Properties

Physical Form
Appearance
Colorless to yellow liquid
Typical Properties
ValueUnitsTest Method / Conditions
Activitymin. 99%-
Density (at 25°C)approx. 1.03g/mL-
Specific Gravity (at 25°C)approx. 1.03
Phosphorous Content12.0 - 13.0%-
pH Valuemax. 3.0--
Specifications
ValueUnitsTest Method / Conditions
Colormax. 4Gardner
Moisture Contentmax. 1.0%-
Acid Value 2 (at pH 9.0 - 9.5)290 - 330--

Packaging & Availability

Regional Availability
  • North America