Creosote itself is non-toxic, but it is a strong alkali that is corrosive and can cause some harm if inhaled. Sodium hydroxide is the common name for sodium hydroxide, a strong alkali, which is non-toxic, but has a strong corrosive properties, and at the same time has a strong irritant. If inadvertently inhaled into the human body, it will cause corrosion and irritation to the respiratory tract, especially the nasal mucosa. Sodium hydroxide is not volatile, but soluble in water, so it is not easy to contain sodium hydroxide in the vapor, but it may be contained in the dust powder, which can be inhaled and cause harm. Therefore, inhalation of sodium hydroxide is still harmful to the human body. If inhaled inadvertently, you need to go to the hospital in time for medical treatment.