Diffusion barrier

{
  "id": "MLC-T-CHM-003192",
  "term": "Diffusion barrier",
  "field": "Chemistry",
  "definition": "A layer or membrane that controls the rate at which a substance, such as a drug, moves from a region of higher concentration to one of lower concentration. In pharmaceutics, this is a key component in modified-release dosage forms, regulating the release of the active pharmaceutical ingredient into the body over time. The barrier's properties, like thickness and porosity, determine the drug's diffusion rate.",
  "subject": "Chemistry and Human Health",
  "see_also": [
    "coating",
    "embedding"
  ],
  "references": [
    "PAC, 2009, 81, 971. 'Glossary of terms related to pharmaceutics (IUPAC Recommendations 2009)' on page 982 (https://doi.org/10.1351/PAC-REC-04-10-14)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/diffusion-barrier/"
}