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
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	danger	no GHS pictograms	no GHS pictograms
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

1. ↑ ^{a b} Data sheet Phthaldialdehyde from Sigma-Aldrich , accessed on November 3, 2016 ( PDF ).
2. ↑ ^{a b} data sheet isophthalaldehyde from Sigma-Aldrich , accessed on November 3, 2016 ( PDF ).
3. ↑ ^{a b c} data sheet terephthalaldehyde from Sigma-Aldrich , accessed on April 26, 2011 ( PDF ).