What's the plural form of paranitraniline red? Here's the word you're looking for.
Answer
The noun paranitraniline red can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be paranitraniline red.
However, in more specific contexts, the plural form can also be paranitraniline reds e.g. in reference to various types of paranitraniline reds
or a collection of paranitraniline reds.