https://github.com/davepinch/pinchy.cc/blob/master/content/topics/chemistry/compounds/sodium-hydroxide/sodium-hydroxide.md
Sodium hydroxide (Wikipedia) Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na+ and hydroxide anions OH−.