Nitric acidDefinition (http://en.wikipedia.org/wiki/Nitric_acid) Nitric acid (HNO3), also known as aqua fortis and spirit of niter, is a highly corrosive strong mineral acid. The pure compound is colorless, but older samples tend to acquire a yellow cast due to the accumulation of oxides of nitrogen. (Wikipedia) Preferred Units: N/A Scope Note: N/A This term is used for the following terms: HNO3
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