Cymole
| Cymole | |||||||
| Surname | o -Cymol | m -Cymol | p -Cymol | ||||
| other names |
o -Methylcumol o -Isopropyltoluol |
m -Methylcumol m -Isopropyltoluol |
p -Methylcumol p -Isopropyltoluol |
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| Structural formula |
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| CAS number | 527-84-4 | 535-77-3 | 99-87-6 | ||||
| PubChem | 10703 | 10812 | 7463 | ||||
| Molecular formula | C 10 H 14 | ||||||
| Molar mass | 134.22 g mol −1 | ||||||
| Physical state | liquid | ||||||
| Brief description | colorless liquid | ||||||
| Melting point | −71.5 ° C | −63.7 ° C | −67.94 ° C | ||||
| boiling point | 178.1 ° C | 175.1 ° C | 177.1 ° C | ||||
| solubility | insoluble in water, miscible with ethanol, diethyl ether, acetone, benzene, petroleum ether and tetrachloromethane |
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GHS labeling |
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| H and P phrases | 226 | 226 | 226-315-319-335 | ||||
| no EUH phrases | no EUH phrases | no EUH phrases | |||||
| no P-phrases | no P-phrases | 261-305 + 351 + 338 | |||||
The cymenes ( Methylcumole , Isopropyltoluole ) constitute a group of substances from aromatic hydrocarbons , the structure of a benzene ring having an isopropyl group (-CH (CH 3 ) 2 ) and a methyl group (-CH 3 ) as a substituent is. Their different arrangement results in three constitutional isomers with the empirical formula C 10 H 14 . They also belong to the group of C 4 benzenes . The best-known isomer is p -cyymol , it is the only one that occurs in nature and is one of the terpenes .
properties
The melting and boiling points show only minor differences from one another. The p -cyymol, which has the highest symmetry, no longer shows any particular deviations.
Web links
Commons : Cymole - collection of images, videos and audio files
Individual evidence
- ↑ a b c d e f g David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-316.
- ↑ Data sheet o-Cymene, 99% from Sigma-Aldrich , accessed on December 25, 2012 ( PDF ).
- ↑ Data sheet m-Cymene, 99% from Sigma-Aldrich , accessed on December 25, 2012 ( PDF ).
- ↑ Entry on 4-isopropyltoluene in the GESTIS substance database of the IFA , accessed on November 29, 2012(JavaScript required) .