Used as raw material for organic synthesis. It can be made into Trinitrofluorenone for electrostatic copying, aryl transparent nylon, Indanthrone blue dye instead of anthraquinone, antispasmodic, sedative, analgesic, antihypertensive, synthetic insecticide, herbicide, etc. Preparation of impact resistance of organic glass and Fluorenaldehyde Resin; can also be used as wetting agent, detergent, liquid flash agent, disinfectant, etc. .