Ricinoleic Acid


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Related to Ricinoleic Acid: castor oil

ricinoleic acid

[¦ris·ən·ō¦lē·ik ′as·əd]
(organic chemistry)
C18H34O3 Unsaturated fatty acid; a combustible, water-insoluble, viscous liquid; soluble in most organic solvents; boils at 226°C (10 mmHg); used as a chemical intermediate, in soaps and Turkey red oils, and for textile finishing. Also known as castor oil acid.

Ricinoleic Acid

 

a monobasic unsaturated fatty acid, CH3(CH2)5CH(OH)CH2CH═CH(CH2)7COOH. It is a colorless, viscous liquid, with a melting point of 5.5°C, a boiling point of 226°–228°C (1.33 kilonewtons/m2), and a density of 0.950 g/cm3 (15°C). It is insoluble in water but freely soluble in alcohol and ether. The ester formed from ricinoleic acid and glycerin is the main constituent (up to 85 percent) of castor oil, from which ricinoleic acid is separated by hydrolysis in a mixture with other fatty acids. Pure ricinoleic acid can be obtained from this mixture, which in industry is itself generally referred to as ricinoleic acid, by low-temperature crystallization from acetone. Esters of ricinoleic acid, for example, butyl ricinoleate, and the salts of the acid esters of ricinoleic acid and sulfuric acid are used as emulsifiers, dispersing agents, and lubricants in the textile industry. Castor oil and the methyl ricinoleate obtained from castor oil serve as raw materials in the preparation of such substances as sebacic and undecylenic acids, heptanal, and 2-n-octanol.

References in periodicals archive ?
In the next generation, all the [S.sub.3] seeds of the six [S.sub.2] plants obtained from high oleic acid/low ricinoleic acid [S.sub.2] seeds expressed the character uniformly with oleic acid values ranging from 734 to 832 g [kg.sup.-1] (Table 3, Fig.
We have shown that SEAR, a surfactant derived from ricinoleic acid, is capable of acting as reducing and capping agents in the synthesis of silver nanoparticles in alkaline medium.
Due to dehydration process major part of ricinoleic acid was converted into NCLA and CLA.
Pro- and anti-inflammatory actions of ricinoleic acid: similarities and differences with capsaicin.
CO is an ester product of glycerol and ricinoleic acid, and hence the CO-based polyurethane chains include ester bonds besides urethane bonds.
Physical constants: Density [d.sup.15]15 0.9090 Temperature of hardening, [degrees]C -18 Factor of refraction [ND.sup.20] 1.479 Chemical constants: Number of saponification mg KOH/g 176 Acetyl number 146 Iodine number, g [J.sub.2]/100 g 82 Radon number 81 Average molecular weight of fat acids 290 Chemical composition (% mass): Stearin acid (together with dioxystearin acid) 3.0 Oleic acid 8.0 Linoleic acid 3.0 Ricinoleic acid 80.0 Castor oil differs from other fats in solubility and some other properties-high density, big viscosity, and high acetylic number.
Dienes such as 4,7-heptadiene, (9) 3,6-nonadiene, (10) and 2,5-undecadiene, (11) as well as methyl and ethyl esters of the unsaturated fatty acids linoleic, linolenic, and ricinoleic acid, (12-15) have been used as model compounds for alkyd resin precursors.
The newer Polycin DTM series polyols (D for diols, T for triols, and M for multi-functional polyols) are based on ricinoleic acid combined with glycerin and other glycols to produce compounds that reportedly give castor oil new dimensions in performance.
Stimulants (eg, bisacodyl, cascara, senna, ricinoleic acid) cause rhythmic muscle contractions in the intestines and increase intestinal motility and secretions.
However, castor oil, which is converted to ricinoleic acid in the gut, is an irritant that may induce premature labor.