Md. Code, Environment § 9–1502

This subtitle does not apply to a cleaning agent that is:

(1) A detergent used in dairy, beverage, or food processing cleaning equipment;

(2) A phosphoric acid product, including a sanitizer, brightener, acid cleaner, or metal conditioner;

(3) A detergent used in hospitals, veterinary hospitals or clinics, or health care facilities or in agricultural production;

(4) A detergent used by industry for metal cleaning or conditioning;

(5) Manufactured, stored, or distributed for use or sale outside of the State;

(6) Used in any laboratory, including a biological laboratory, research facility, chemical laboratory, and engineering laboratory; or

(7) Used in a commercial laundry that provides laundry services for a hospital, health care facility, or veterinary hospital.