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