| C_{6}H_{3}(NO_{3})_{3} S.-Tri-nitro-benzene. Solid. M.P. 121° C. |
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| C_{6}H_{4}(CH_{3})NO_{2} Ortho-, meta-, and para- nitro-toluenes. |
| B.P. 218°, 230°, and 234° C, Para compound solid. |
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| C_{6}H_{3}(CH_{3})_{2}NO_{2} Nitro-xylene. Liquid. |
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| C_{6}H_{2}(CH_{3})_{3}NO_{2} Nitro-mesitylene. Solid. |
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| C_{6}H_{3}(CH_{3})(NO_{2})_{2} Di-nitro-toluenes. |
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| C_{6}H_{4}Cl(NO_{2}) Nitro-chloro-benzenes. |
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| C_{6}Br_{4}(NO_{2})_{2} Tetra-bromo-di-nitrobenzene. |
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The nitro compounds are mostly pale yellow liquids, which distil
unchanged, and volatilise with water vapour, or colourless or pale yellow
needles or prisms. Some of them, however, are of an intense yellow colour.
Many of them explode upon being heated. They are heavier than water, and
insoluble in it, but mostly soluble in alcohol, ether, and glacial acetic
acid.

Nitro-benzene, C_{6}H_{5}(NO_{2}), was discovered in 1834 by Mitscherlich.
It is a yellow liquid, with a melting point of +3° C. It has an intense