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| CAS No. | 71-43-2 |
| Chemical Name: | Benzene |
| Synonyms: | PHENE;BENZOL;Benzen;Fenzen;BENZENE;Benzeen;Benzole;Benzolo;Annulene;BenzeneI |
| CBNumber: | CB6854153 |
| Molecular Formula: | C6H6 |
| Formula Weight: | 78.11 |
| MOL File: | 71-43-2.mol |
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| Benzene Property |
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| density : |
0.874 g/mL at 25 °C(lit.)
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| vapor density : |
2.77 (vs air)
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| vapor pressure : |
166 mm Hg ( 37.7 °C)
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| refractive index : |
n20/D 1.501(lit.)
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| Water Solubility : |
0.18 g/100 mL |
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| Stability:: |
Stable. Substances to be avoided include strong oxidizing agents, sulfuric acid, nitric acid, halogens. Highly flammable. |
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Benzene Chemical Properties,Usage,Production |
Chemical Properties
colourless liquid |
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General Description
A clear colorless liquid with a petroleum-like odor. Flash point less than 0°F. Less dense than water and slightly soluble in water. Hence floats on water. Vapors are heavier than air. |
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Air & Water Reactions
Highly flammable. Slightly soluble in water. |
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Reactivity Profile
Benzene reacts vigorously with allyl chloride or other alkyl halides even at minus 70°C in the presence of ethyl aluminum dichloride or ethyl aluminum sesquichloride. Explosions have been reported [NFPA 491M 1991]. Ignites in contact with powdered chromic anhydride [Mellor 11:235 1946-47]. Incompatible with oxidizing agents such as nitric acid. Mixtures with bromine trifluoride, bromine pentafluoride, iodine pentafluoride, iodine heptafluoride and other interhalogens can ignite upon heating [Bretherick 5th ed. 1995]. Benzene and cyanogen halides yield HCl as a byproduct (Hagedorn, F. H. Gelbke, and Federal Republic of Germany. 2002. Nitriles. In Ullman Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH & Co. KGaA.). The reaction of Benzene and trichloroacetonitrile evolves toxic chloroform and HCl gasses. (Hagedorn, F., H.-P. Gelbke, and Federal Republic of Germany. 2002. Nitriles. In Ullman Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH & Co. KGaA.). |
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Health Hazard
Dizziness, excitation, pallor, followed by flushing, weakness, headache, breathlessness, chest constriction, nausea, and vomiting. Coma and possible death. |
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Fire Hazard
Behavior in Fire: Vapor is heavier than air and may travel considerable distance to a source of ignition and flash back. |
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