pentane noun. ['pɛntʌɪn] L19.
[from PENTA- + -ANE.]
Chemistry. Each of three isomeric liquid alkanes with the formula C₅H₁₂; esp. (also n-pentane) the unbranched isomer, CH₃(CH₂)₃CH₃.

■ penta'noic adjective:

■ pentanoic acid, a fatty acid, CH₃(CH₂)₃COOH, that is an oily liquid present in various plant oils (also called

■ valeric acid) E20.

■ pentanol noun each of the isomeric alcohols of the formula C₅H₁₁OH; esp. (more fully

■ pentan-1-ol) the unbranched primary alcohol, CH₃(CH₂)₃CH₂OH (n-amyl alcohol): M20.

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