2-Ethylhexyl 2-Ethylhexyl Phosphate SI 507

Molecular Formula: (C₈H₁₇)₂HPO₃

Molecular Weight: 306.4 (International Atomic Weight Table, 1987)

CAS No.: 14802-03-0

Product Overview

2-Ethylhexyl 2-Ethylhexyl Phosphate (SI 507), also known as the equivalent of PC-88A, is a high-performance organophosphorus extractant. It appears as a colourless or yellowish transparent viscous oily liquid that demonstrates excellent stability and selectivity in the extraction and separation of non-ferrous and rare earth metals.

This compound is soluble in alcohol, benzene, acetone, and various organic solvents, but insoluble in water, making it ideal for solvent extraction processes in hydrometallurgy and chemical industries.

Physical and Chemical Properties

Item Specification
Appearance Colourless or yellowish transparent viscous oily liquid
Content (%) ≥ 95.0
Diacid (%) ≤ 2.6
Density (20 °C, g/ml) 0.940 – 0.960
Refractive Index (N²⁵D) 1.4480 – 1.4520
Acid Value (mg KOH/g) 175 ± 3
Chroma (Pt-Co) ≤ 120
Viscosity (25 °C, CPS) 36 ± 3
Flash Point (°C) 170 ± 3
Phase Separation Speed (s) ≤ 150

Key Characteristics

  • High extraction efficiency and phase separation speed
  • Excellent stability under acidic conditions
  • Strong selectivity for non-ferrous and rare earth metal ions
  • Compatible with common organic solvents
  • Reliable performance under varying process conditions

Applications

SI 507 is an acid phosphorus-type extractant widely used in:

  • Extraction and separation of non-ferrous metals (e.g., cobalt, nickel, copper, zinc)
  • Rare earth metal purification processes
  • Hydrometallurgical operations for metal recovery
  • Wastewater treatment where selective metal removal is required
  • Chemical synthesis as an intermediate in surfactant and plasticizer production

Its selectivity and chemical stability make it an essential reagent for industries involved in metal extraction, refining, and recycling.

Packaging and Storage

  • Packing: 200 Kg per plastic or steel barrel
  • Storage: Store in a cool, dry, and well-ventilated area, away from heat sources, fire, and moisture.
  • Handling: Avoid vigorous impact and ensure containers are sealed tightly. Use appropriate protective equipment during handling.

Industrial Significance

2-Ethylhexyl 2-Ethylhexyl Phosphate (SI 507), equivalent to PC-88A, is a reliable and efficient organophosphorus extractant known for its high purity, superior selectivity, and versatility. It serves as a key component in metal recovery, chemical processing, and industrial solvent extraction applications — delivering consistent performance and long-term stability.

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