Ammonia in Perfumery | Première Peau

Sharp, acrid, and penetrating. The olfactory impact is immediate and visceral -- a chemical sharpness that triggers an instinctive recoil. At extreme dilution, the sharpness softens to a clean, mineral quality that some describe as 'wet concrete' or 'morning air after rain.' The smell is universal: cleaning products, old stables, certain cheeses, the back of a biology classroom.

Ammonia (NH3, CAS 7664-41-7) is a colorless gas with a universally recognized odors: sharp, acrid, and eye-watering. In perfumery, ammonia is not used as an ingredient but exists as an olfactory concept -- a descriptor for the sharp, urinous, or pungent facets found in certain natural and synthetic materials.

Several legitimate perfumery ingredients carry ammonia-like facets: castoreum (beaver castor), civet, certain musks, and some amine-containing synthetics. The ammoniacal quality in these materials can range from subtly animalic (adding life and warmth) to genuinely off-putting (requiring careful dosing).

As a pure substance, ammonia is a gas at room temperature (boiling point -33C) with a molecular weight of 17.03. It is produced industrially via the Haber-Bosch process and is a widely manufactured chemicals globally, used in fertilizers, cleaning products, and industrial chemistry.