fulminating mercury vs mercury fulminate

fulminating mercury and mercury fulminate both are nouns.

Word	Noun	Adjective	Verb	Adverb
fulminating mercury	Yes	No	No	No
mercury fulminate	Yes	No	No	No

As nouns, fulminating mercury and mercury fulminate are synonyms defined as:

fulminating mercury and mercury fulminate: a fulminate that when dry explodes violently if struck or heated; used in detonators and blasting caps and percussion caps

Other synonyms of fulminating mercury include fulminate of mercury.

fulminating mercury (noun)	mercury fulminate (noun)
a fulminate that when dry explodes violently if struck or heated; used in detonators and blasting caps and percussion caps	a fulminate that when dry explodes violently if struck or heated; used in detonators and blasting caps and percussion caps