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Physical & Chemical properties

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The physical and chemical properties of the reaction mass of maleic acid and phtalic acid as produced (reaction mass in 90% water) have not been assessed as such due to the nature of the constituents, their low concentration in water and the confinement of the installation in the plant.

A summary of the main publicly available physical and chemical properties of the individual components is proposed below (source HSDB):

   MALEIC ACID
(CAS 110 -16 -7)
 PHTALIC ACID
(CAS 88 -99 -3)
 BENZOIC ACID
(CAS 65 -85 -0)
 CITRACONIC ACID
(CAS 498 -23 -7)
 FUMARIC ACID
(CAS 110 -17 -8)
 % in produced
substance
 6.65  1.78  0.68  0.53  0.31
 Status as pure substance
@ 20°C
 solid  solid  solid  liquid  solid
 Melting point 138°C  decomposes @ 230°C  122.4°C  7°C  287°C
 Boiling point  decomposes @138°C    249.2°C  213°C  
 density @20°C  1.59  1.59  1.265  1.246  1.635
 solubility in water  788 g/l  6.965 mg/l  3.5 g/l    7 g/l
 flash point  not applicable  168°C  121°C  not available  not applicable

Based on these informations, physical and chemical properties of the reaction mass as produced (90% water) are not expected to trigger any classification based on phys chem hazards.