What's the plural form of phenolsulfonphthalein? Here's the word you're looking for.
Answer
The noun phenolsulfonphthalein can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be phenolsulfonphthalein.
However, in more specific contexts, the plural form can also be phenolsulfonphthaleins e.g. in reference to various types of phenolsulfonphthaleins
or a collection of phenolsulfonphthaleins.
Examples
Lipophilic impurities, not phenolsulfonphthalein, account for the estrogenic activity in commercial preparations of phenol red.
