"🚫🧪": This symbol indicates the prohibition or restriction of laboratory experiments or chemical testing. It can represent a warning against conducting experiments or using certain substances in a particular context. Denaturant: A denaturant is a substance added to another substance, typically ethanol, to make it unsuitable for consumption. Denaturants are used to deter people from drinking products that are not intended for human consumption, such as industrial solvents or certain types of alcohol.