Stearidonic acid

CAS Number
20290-75-9
EC Number
606-502-1

What is Stearidonic acid?

Stearidonic acid (CAS 20290-75-9), abbreviated SDA or C18:4, is an omega-3 fatty acid derived primarily from plant sources such as echium and hemp seed oil.

Where is Stearidonic acid used?

  • Food and nutraceutical: functional foods, dietary supplements and fortified beverages for omega-3 enrichment without marine-sourced ingredients
  • Feed: enhances the omega-3 profile of livestock and aquaculture products
  • Personal care: SDA-rich oils in skin-conditioning products
  • Pharmaceutical and nutraceutical development: reference standard or active ingredient in clinical-grade omega-3 research formulations
  • It functions as a metabolic precursor to longer-chain omega-3s.

Commercial specifications

  • Purity from standard oil concentrations up to highly purified isolates for pharmaceutical or analytical use
  • Packaging from small R&D quantities to bulk volumes

Other Names (Synonyms)

Stearidonic acid C18:4|6,9,12,15-Octadecatetraenoic acid|6,9,12,15-Octadecatetraenoate|(6Z,9Z,12Z,15Z)-Octadecatetraenoic acid|SDA|P4CEK3495O|RefChem:185402|Moroctic acid

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What are the physical properties of Stearidonic acid?

Melting Point -57.4--56.6 °C
Boiling Point 382.5±11.0 °C(Predicted)
Density 0.9297 g/cm³ @ Temp: 20 °C
Flash Point 17 °C
Color Clear Colorless to Light Yellow
Form liquid
Refractive Index 1.4930 (589.3 nm 15℃)
Log P 5.890 (est)

Which trade and regulatory codes apply to Stearidonic acid?

UN Number 1170
ADR Class 3
Packing Group II
WGK (Germany) 3
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