The clue "Nitrogen-based dye" last appeared in the The Washington Post crossword on August 22, 2019. The correct answer for this puzzle is "AZO", a 3-letter word.
Solution AZO is 3 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is AZO with 3 letters, and the shortest is AZO with 3 letters.
No, "NITROGEN-BASED DYE" hasn´t seen a spike right now. Solvers are most interested in: deferred, asexual, Curse, ___ podrida and Delivery docs, for short.
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The solution is 3 letters long.