Crossword clue: a complex red organic pigment containing iron and other atoms to which oxygen binds

The most common answer is haem (4 letters).

3 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

haem 4 letters wn-def

a complex red organic pigment containing iron and other atoms to which oxygen binds

hematin 7 letters wn-def

a complex red organic pigment containing iron and other atoms to which oxygen binds

heme 4 letters wn-def

a complex red organic pigment containing iron and other atoms to which oxygen binds