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Castor Oil
By
Miss Gayatri Patra
Assistant Professor
EPCP, Bangalore, India
Castor Oil
Synonym-Ricinus Oil.
Biological Source-Castor oil is the fixed oil obtained by the cold
expression of the seeds of Ricinus communis, family Euphorbiaceae.
Geographical Source- Castor seeds are produced in almost all tropical
and sub-tropical countries.
Chemical Constituents
• Castor seeds contains 35-50% of castor oil.
• Castor oil chiefly contains triglyceride of ricinoleic acid(about 80 per
cent).
• Other glycerides are also present in the drug, where the fatty acids
are represented by isoricinoleic,linoleic,stearic and isostearic acids.
• The viscosity of the castor oil is due to ricinoleic acid.
Identification Test
• It mixes with half it’s volume of light petroleum ether (40-60°) but
insoluble in double the volume of petroleum ether.
• Add to the oil an equal volume of ethanol; clear liquid is obtained. On
cooling at 0°C and on storage for three hours; the liquid remains clear
(distinction from other fixed oils).
Uses:-
Castor oil is mild purgative, fungistatic, used as an ointment base, as
plasticizer, wetting agents, as a lubricating agent. Ricinoleic acid is used
in contraceptive creams and jellies; it is also used as an emollient in the
preparation of lipsticks, in tooth formulation, as an ingredient in hair
oil.

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Castor Oil

  • 1. Castor Oil By Miss Gayatri Patra Assistant Professor EPCP, Bangalore, India
  • 2. Castor Oil Synonym-Ricinus Oil. Biological Source-Castor oil is the fixed oil obtained by the cold expression of the seeds of Ricinus communis, family Euphorbiaceae. Geographical Source- Castor seeds are produced in almost all tropical and sub-tropical countries.
  • 3.
  • 4. Chemical Constituents • Castor seeds contains 35-50% of castor oil. • Castor oil chiefly contains triglyceride of ricinoleic acid(about 80 per cent). • Other glycerides are also present in the drug, where the fatty acids are represented by isoricinoleic,linoleic,stearic and isostearic acids. • The viscosity of the castor oil is due to ricinoleic acid.
  • 5. Identification Test • It mixes with half it’s volume of light petroleum ether (40-60°) but insoluble in double the volume of petroleum ether. • Add to the oil an equal volume of ethanol; clear liquid is obtained. On cooling at 0°C and on storage for three hours; the liquid remains clear (distinction from other fixed oils).
  • 6.
  • 7. Uses:- Castor oil is mild purgative, fungistatic, used as an ointment base, as plasticizer, wetting agents, as a lubricating agent. Ricinoleic acid is used in contraceptive creams and jellies; it is also used as an emollient in the preparation of lipsticks, in tooth formulation, as an ingredient in hair oil.

Editor's Notes

  1. Castor Oil