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Substance Name: Lecithin [NF]
RN: 8002-43-5


  • A complex mixture of PHOSPHOLIPIDS; GLYCOLIPIDS; and TRIGLYCERIDES; with substantial amounts of PHOSPHATIDYLCHOLINES; PHOSPHATIDYLETHANOLAMINES; and PHOSPHATIDYLINOSITOLS, which are sometimes loosely termed as 1,2-diacyl-3-phosphocholines. Lecithin is a component of the CELL MEMBRANE and commercially extracted from SOYBEANS and EGG YOLK. The emulsifying and surfactant properties are useful in FOOD ADDITIVES and for forming organogels (GELS).
  • Derivatives of phosphatidic acids in which the phosphoric acid is bound in ester linkage to a choline moiety. Complete hydrolysis yields 1 mole of glycerol, phosphoric acid and choline and 2 moles of fatty acids.
  • Major egg yolk proteins from egg-laying animals such as non-mammalian VERTEBRATES; ARTHROPODS; and others. They are high-density lipoglycoproteins derived from circulating precursors, VITELLOGENINS. Vitellins serve as nutrients for the growing non-mammalian embryos (EMBRYO, NONMAMMALIAN).
  • TSCA Definition 2019: The complex combination of diglycerides of fatty acids linked to the choline ester of phosphoric acid.

Molecular Formula

  • Unspecified

Molecular Weight

  • 311.2252

Classification Codes

  • Pharmaceutic Aid (Emulsifying Agent)
  • Surface-Active Agents

Names and Synonyms

Name of Substance

  • Lecithin
  • Lecithin [NF]

MeSH Heading

  • Lecithins


  • Acti-flow 68-sb
  • Alcolec S
  • CCRIS 7265
  • EINECS 232-307-2
  • Emulthin M-35
  • Gliddex
  • Granulestin
  • HSDB 1903
  • Kelecin
  • Lecithin
  • Lecithins
  • Lecithol
  • LT-02
  • Ovovitellin
  • Phosphatidylcholine
  • Phospholutein
  • Vitellin

Systematic Names

  • Lecithine
  • Lecithins

Superlist Names

  • Lecithin
  • Lecithins

Registry Numbers

CAS Registry Number

  • 8002-43-5

Other Registry Numbers

  • 1799810-04-0
  • 252035-82-8
  • 55128-59-1
  • 8035-17-4
  • 8052-43-5
  • 8057-53-2

System Generated Number

  • 0008002435

Structure Descriptors




Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD oral > 8mL/kg (8mL/kg) LIVER: OTHER CHANGES

Laboratory Investigation. Vol. 47, Pg. 194, 1982.