When officers arrived, they were directed by family members to a bedroom where the man was found and pronounced dead by Rockland Paramedic Services, Peters said.
A note was located in the room that advised first responders of a possible chemical-induced suicide, Peters said.
Firefighters with the West Nyack Fire Department and the Rockland County Hazmat unit were requested to the scene.
Hazmat officials determined there were no airborne chemicals or any other safety hazards, Peters said.
"The Clarkstown Police are saddened by incidents such as these when a life is lost," Peters said. "We would like to remind everyone that services are available such as The National Suicide Prevention Lifeline."
The Lifeline provides 24/7, free and confidential support for people in distress at 1-800-273-8255 or suicidepreventionlifeline.org.
Click here to follow Daily Voice Harrison and receive free news updates.