A variant or related form of cyanol, referring to blue-colored chemical compounds used historically in dye and pigment production.
From cyano- (Greek kyanos 'dark blue') + -ole (a chemical suffix, possibly from alcohol or aromatic compounds). This earlier spelling variant reflects 19th-century inconsistency in chemical nomenclature before systematic IUPAC naming.
The confusion between cyanol and cyanole shows how messy early chemistry naming was—chemists would invent names independently in different countries, creating multiple names for the same thing until international standards were established.
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