Some parts are more likely to get infected or have problems. Piercings on your ear lobes usually take about 6-8 weeks to heal. However, piercings on the side of your ear (cartilage) can take anywhere from 4 months to 1 year to heal.
Ammonia is a colorless inorganic compound of nitrogen and hydrogen with the formula NH3, usually in gaseous form with a characteristic pungent odor. Ammonia is irritating to the skin, eyes, nose, throat, and lungs. It is essential for many biological processes and has various industrial applications.
Confidence votes 261K. NH4 in chemistry is the formula for ammonium. It consists of one nitrogen atom to 4 hydrogen atoms. It is formed when a chemical process converts ammonia with the chemical formula NH3 to ammonium.