castor oil

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castor oil,

yellowish oil obtained from the seed of the castor beancastor bean,
bean produced by Ricinus communis, a plant of the spurge family, widely cultivated as an ornamental. Moles die when they eat the roots. It has long been used as an ordeal poison in parts of Africa.
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. The oil content of the seeds varies from about 20% to 50%. After the hulls are removed the seeds are cold-pressed. Medicinal castor oil is prepared from the yield of the first pressing; this is used as a purgative and laxative. Oil from the second pressing is used as a lubricant for machinery, as a softening agent in making artificial leather, in the dressing of genuine leather, in brake fluids, and in paints and plastic materials. The residue can be used as fertilizer and (after the poisonous substance, ricin, is removed) as cattle feed. Other products having similar properties and uses have been gradually replacing castor oil.

Castor Oil


a fatty vegetable oil obtained from the seeds of the castor-oil plant. It is one of the nondrying liquid oils; it contains 3–9 percent oleic acid, 3–5 percent linoleic acid, and at least 80 percent ricinoleic acid. The high content of the ricinoleic acid is responsible for the properties of castor oil: high kinematic viscosity (more than X 10 -6 m2/sec at 50°C) and density (950–974 kg/m3 at 15°C). Unlike other fatty vegetable oils, it is readily soluble in alcohol but poorly soluble in benzine.

Castor oil is widely known for its medicinal properties. The ancient Egyptians used it to make all kinds of ointments and balms. It is best known for its use as a laxative. Combined with quinine, Pituitrin, pachycarpinum, and other substances, it is used to induce labor. Ointments and balms containing castor oil are used in the treatment of burns and ulcers, softening of the skin, and so forth. Castor oil has also found application in some branches of industry—for example, soap manufacture and oil boiling. Castor oil is a high-grade lubricant.

castor oil

[′kas·tər ¦ȯil]
A colorless or greenish nondrying oil extracted from the castor bean; used as a cathartic, in soap, and after processing as a lubricant, and as a leather preservative. Also known as ricinus oil.

castor oil

a colourless or yellow glutinous oil obtained from the seeds of the castor-oil plant and used as a fine lubricant and as a cathartic
References in periodicals archive ?
There are plans to make many more industrial and specialty grades of castor oil.
In the present work, we describe the direct polycondensation of castor oil with terephthalic acid (TFA) catalyzed by different ricinoleate complexes using bi-valent Lewis metal cations in order to evaluate their catalytic activity.
20) Castor oil has found application as a softener and as a raw material source for polyamides.
Pure castor oil was procured from a super market in Saddar, Karachi, Pakistan.
Some recent studies on the transesterification of castor oil have been carried out under microwave irradiation.
The alternative feed ingredient being considered in the present study is castor oil bean (Ricinus communis) meal, a by - product of castor oil extraction industry.
The extract exhibited significant anti-diarrheal activity against castor oil induced diarrhea in laboratory albino rats.
The first phase of the production process of biodiesel from castor oil was initiated by mixing methanol with sodium hydroxide as a catalyst, forming sodium methoxide (Na + CH3O-) in an exothermic reaction, which was subsequently blended with the castor oil based on the mixtures B5, B10, and B20, according to the NTC 100/04 standard.
While there is no danger in consuming castor oil, eating the whole seeds can be deadly.
11 April 2013 - French chemical company Arkema SA (EPA:AKE) said Thursday it had inked a joint venture agreement with Jayant Agro-Organics Ltd (BOM:524330), under which it will acquire an interest of about 25% in Ihsedu Agrochem Pvt Ltd, a unit of the Indian castor oil and derivatives producer.