Probable lethal dose is 2 to 4 grams of free iodine. Causes eye irritation. Causes tearing and inflammation of the eyelids. Crystalline iodine or strong solutions are severe skin irritants. Lesions resemble thermal burns.
Allergic sensation can occur.
Persons with preexisting skin disorders, eye problems, impaired respiratory function, or disease of the thyroid, lungs, or kidney may be more susceptible to the effects of the substance. Wash out mouth with water if person is conscious. Call poison control center for assistance. Get emergency medical assistance. Never give anything by mouth to an unconscious person.