Appearance: White solid ; Colourless-to-white hygroscopic crystals or powder. turns opaque on exposure to air ; White to gray, odorless powder. [herbicide] [Note: Becomes opaque on exposure to air.]
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.]
H2O – Water, oxidane
Other names: Water (H2O), Hydrogen hydroxide (HH or HOH), Hydrogen oxideDihydrogen monoxide (DHMO) (systematic name), Hydrogen monoxide, Dihydrogen oxide, Hydric acid, Hydrohydroxic acid, Hydroxic acid, Hydrol, Μ-oxido dihydrogen, Κ1-hydroxyl hydrogen(0)
Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas