Chemical substance
matter of constant composition best characterized by the entities (molecules, formula units, atoms) it is composed of and characterized by physical properties like density
adsorbent
scavenger
promoter
precursor
ignition means
buprenorphine/naloxone
cocoa butter
contraceptive
active substance
alizarin dye
allosteric modulator
fuel additive
attractant
doxorubicin hydrochloride
prostaglandin a1
hematin
solvent orange 1
preservative
agrochemical
distilled water
anti-fog
tall oil
concrete
industrial chemical
avocado oil
vitamin B3
toxicant
silica gel
entheogen
fixative
acetone peroxide
Iron nitride
mumia
additive
household chemicals
chlorine solution
gum
spermaceti
psychoactive drug
penetrating oil
agonist
poison
xenobiotic
nitride compound
antagonist
phosphide
bisphosphonate
phycobilins
aniline black
transition metal carbene complex