Definition and Etiology. Primary sclerosing cholangitis (PSC) is a chronic, progressive, cholestatic liver disease resulting from inflammation, fibrosis, and destruction of the intrahepatic and extrahepatic bile ducts. This leads to multiple areas of stricturing in the biliary tree and eventually to cirrhosis.
Octinoxate is a chemical compound that is found in many different types of cosmetics and personal care products. Manufacturers derive this ingredient from petroleum by-products, then add it to makeup, lotion and moisturizers.unscreen products containing octinoxate may reduce freckles. Octinoxate is used in some lipsticks and other cosmetics to provide protection from the sun. Octinoxate is found in most sunscreen products. Octinoxate is made from methanol and sulfuric acid.
Ammonia is a toxic, basic gas with the formula NH3. Ammonium nitrate is a solid, mildly acidic and potentially explosive salt with the formula NH4NO3. It is formed by the re â¦ action of ammonia with nitric acid.mmonium is a polyatomic ion with the formula NH4+. The ammonium ion is formed when ammonia reacts with an aci â¦ d and is itself mildly acidic. because it is positively charged is is not found on its own but accompanied by a negative ion such as in ammonium nitrate, NH4NO3.