Niobium(V) chloride
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| Name | Niobium(V) chloride / Niobium pentachloride |
| CAS number | 10026-12-7 |
| Chemical formula | NbCl 5 |
Niobium pentachloride is known in two forms, lemon yellow and white (transition point 183 °C). When interacting with water, an acid precipitate of the composition NbO 3 •xH 2 O is released. It also dissolves in concentrated sulfuric and hydrochloric acids to form niobic acid.
This salt is used as a starting material for obtaining pure niobium. In organic chemistry, it is used as a Lewis acid.