Benzene dicarbaldehydes
Benzene dicarbaldehydes | ||||||||
Surname | Benzene-1,2-dicarbaldehyde | Benzene-1,3-dicarbaldehyde | Benzene-1,4-dicarbaldehyde | |||||
other names |
o -Benzene dicarbaldehyde, phthalaldehyde, phthalaldehyde |
m -Benzene dicarbaldehyde, isophthalaldehyde, isophthalaldehyde |
p -Benzenedicarbaldehyde, terephthalaldehyde, terephthalaldehyde |
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Structural formula | ||||||||
CAS number | 643-79-8 | 626-19-7 | 623-27-8 | |||||
PubChem | 4807 | 34777 | 12173 | |||||
Molecular formula | C 8 H 6 O 2 | |||||||
Molar mass | 134.14 g mol −1 | |||||||
Physical state | firmly | |||||||
Melting point | 54-56; ° C | 87-88 ° C | 114-116 ° C | |||||
boiling point | 245-248 ° C | |||||||
GHS labeling |
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H and P phrases | 301-314-317-400 | no H-phrases | no H-phrases | |||||
no EUH phrases | no EUH phrases | no EUH phrases | ||||||
273-280-301 + 310-305 + 351 + 338-310 | no P-phrases | no P-phrases |
In chemistry , the benzene dicarbaldehydes form a group of substances consisting of a benzene ring with two attached aldehyde groups (-CHO). Their different arrangement results in three constitutional isomers with the empirical formula C 8 H 6 O 2 .
The trivial names (phthalaldehyde, isophthalaldehyde, terephthalaldehyde) are derived in a corresponding manner from the benzene dicarboxylic acids ( phthalic acid , isophthalic acid , terephthalic acid ).
Individual evidence
- ↑ a b Data sheet Phthaldialdehyde from Sigma-Aldrich , accessed on November 3, 2016 ( PDF ).
- ↑ a b data sheet isophthalaldehyde from Sigma-Aldrich , accessed on November 3, 2016 ( PDF ).
- ↑ a b c data sheet terephthalaldehyde from Sigma-Aldrich , accessed on April 26, 2011 ( PDF ).