Tags: Chemical Substance, Mineral.
Sal ammoniac is a rare mineral composed of ammonium chloride NH4Cl. It forms colorless to white to yellow-brown crystals in the isometric-hexoctahedral class. It has very poor cleavage and a brittle to conchoidal fracture. It is quite soft with a Mohs hardness of 1.5 to 2 and has a low specific gravity of 1.5. It is water-soluble. Sal ammoniac is also the archaic name for the chemical compound ammonium chloride.
