A synthetic blue dye compound derived from dicyan or dicyanide, used in textile and industrial coloring.
From 'dicyan-' + '-in' (chemical suffix for organic compounds, especially dyes). This dye was developed in the 19th century as synthetic alternatives to natural indigo became economically important.
Dicyanin blue dyes were among the first synthetic colors to compete with expensive natural indigo—they made colorful clothing affordable for ordinary people!
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