Nitric acid 67 % is a highly corrosive mineral acid and inorganic compound with the formula HNO3. It is virtually colourless. However, older samples may have a slight yellow cast due to decomposition into oxides of nitrogen.
| CAS Number: | 7697-37-2 |
| UN Number: | 2031 |
| Hazard Class: | 8 |
| Packing Group: | I |
Most commercially available nitric acid has a concentration of 68% in water. When the solution contains more than 86% HNO3, it is referred to as fuming nitric acid. Depending on the amount of nitrogen dioxide present, fuming nitric acid is further characterised as red-fuming nitric acid at concentrations above 86% or white-fuming nitric acid at concentrations above 95%.
Physical properties of Nitric Acid 67%
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