Colloid osmotic pressure

{
  "id": "MLC-T-CHM-002235",
  "term": "Colloid osmotic pressure",
  "field": "Chemistry",
  "definition": "The contribution to the total osmotic pressure of a solution that is caused by the presence of colloid-sized particles, such as proteins or polymers. This pressure arises because the colloidal particles are too large to pass through a semipermeable membrane that is permeable to the smaller solvent molecules and ions. In biological systems like blood plasma, this pressure, also known as oncotic pressure, is primarily generated by albumin and is approximately 25 mmHg.",
  "synonyms": [
    "Donnan pressure"
  ],
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "colloidal",
    "membrane"
  ],
  "references": [
    "PAC, 1972, 31, 577. 'Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry' on page 615 (https://doi.org/10.1351/pac197231040577)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/colloid-osmotic-pressure/"
}