9-Aminoacridine, a highly fluorescent dye, is commonly used as a antiseptic in clinical and a mutagen or pH indicator in scientific research.

2-氨基吖啶酮常用作不饱和二糖的荧光标签 (λexc= 428 nm，λem= 525 nm)。

Mepacrine 2HCl is an acridine-derived yellow dye, previously used in the therapy and prevention of malaria and later as an antiprotozoal and immunomodulatory agent. It's also an inhibitor of phospholipase A2.