Nitric acid chemical incompatibilities

Earthquakes provide the ultimate test of the storage of incompatible chemicals and are sometimes followed by fires in chemical stores. Very few causes of ignition are found alkali metals halogen oxysalts in conjunction with strong acids and sulphuric or nitric acid and cellulose (wood flooring). These usually then ignite vapours of flammable solvents. 

For example, crotonaldehyde is listed in Table 1 as belonging in Group 19 (Aldehydes). The Chart shows that chemicals in this group should be segregated from sulfuric and nitric acids, caustics, ammonia, and all types of amines (aliphatic, alkanol, and aromatic). According to note A, crotonaldehyde is also incompatible with non-oxidizing mineral acids. 

SAFETY PROFILE Poison by intravenous route. Lanthanum and other lanthanoids can cause delayed blood clotting leading to hemorrhages. Has caused liver injury" in experimental animals. The dust is a dangerous fire hazard when exposed to flame can react vigorously with oxidizing materials. Violent reaction with nitric acid, phosphoms (above 400°C), air, halogens. Moderately explosive in the form of dust when exposed to flame or by chemical reaction. Incompatible with H2O, C, N, B, Se, Si, S. See also RARE EARTHS and POWDERED METALS. 

Combustible when exposed to heat or flame can react with oxidizing materials. To fight fire, use water, CO2, dry chemical. Potentially explosive reaction with concentrated nitric acid. Incompatible with acetanilide, alkalies, ferric salts, spirit nitrous ether, urethan. When heated to decomposition it emits acrid smoke and irritating fumes. 

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