Appearance: Gray-white (anhydrous) | blue (pentahydrate) ; White hygroscopic crystals
HCl – Chlorane, Hydrogen chloride
Other names: Hydrochloric acid, M, Uriatic acidHydronium chloride, Chlorhydric Acid, Hydrochloric acid gas, HCl, Anhydrous hydrogen chloride, Hydrochloric acid, anhydrous, Aqueous hydrogen chloride, [Note: Often used in an aqueous solution.]
Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
Other names: Oil of vitriol, Sulfuric acid, concentrated (> 51% and < 100%), H2SO4Sulphuric acid, Battery acid, Hydrogen sulfate, [SO2(OH)2], [S(OH)2O2], Sulfuric acid (aqueous)
Appearance: Clear, colorless liquid ; Odourless colourless oily hygroscopic liquid ; Colorless to dark-brown, oily, odorless liquid. [Note: Pure compound is a solid below 51°F. Often used in an aqueous solution.]