Castor oil (himashuyu)

Japanese: ヒマシ油(蓖麻子油) - ひましゆ（英語表記）castor oil

Castor oil extracted by pressing from seeds. Seeds contain 35-57% oil. The main component is ricinoleic acid, an unsaturated fatty acid with 18 carbon atoms and a hydroxyl group, accounting for 85-90%. Melting point (freezing point) -10 to -17°C, specific gravity 0.950 to 0.975, refractive index n _D ³⁰ = 1.477 to 1.479, saponification value 176 to 187, iodine value 81 to 91 (non-drying oil). It has a higher viscosity and specific gravity than ordinary fats and oils, and mixes well with alcohol and glacial acetic acid, but is difficult to dissolve in petroleum ether.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

ヒマの実から圧搾法により採取した油。種子の含油率は35～57％。ヒドロキシル基をもつ炭素数18の不飽和脂肪酸であるリシノール酸が主成分で，85～90％を占める。融点(凝固点)－10～－17℃，比重0.950～0.975，屈折率n_D³⁰＝1.477～1.479，ケン化価176～187，ヨウ素価81～91(不乾性油)。一般の油脂より粘度，比重が高く，アルコール，氷酢酸とよく混合するが，石油エーテルには溶けにくい。

出典　株式会社平凡社世界大百科事典第２版について　情報

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