Peroxides may form which may be unstable under certain conditions. Water will not be effective in extinguishing a fire and may spread it, but a water spray can be used to cool fire-exposed containers. Wear full protective clothing and self-contained breathing apparatus. Heat will build pressure and may rupture closed storage containers. Decahydronaphthalene may exert its effects through inhalation, skin absorption, and ingestion.
Exposure can cause irritation to the respiratory tract, dizziness, and headache.
Liquid and high vapor concentration can be irritating. Prolonged or repeated skin contact can cause irritation and dermatitis through defatting of skin. Symptom information is inadequate or unknown. Decahydronaphthalene is a mild eye and mucous membrane irritant and primary skin irritant, central nervous system depressant and neurotoxin. Acute exposure causes irritation, narcosis, and gastrointestinal tract irritation.