adulterator

nouns

any substance that lessens the purity or effectiveness of a substance
"it is necessary to remove the adulterants before use"
adulterant, adulterator
is derived from
adulterate
a changer who lessens the purity or effectiveness of a substance
adulterator
is derived from
adulterate
is a type of (narrower)
a person who changes something
"an inveterate changer of the menu"
changer, modifier