1,2,4,5-Cyclohexanetetracarboxylic aci...
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1,2,4,5-Cyclohexanetetracarboxylic aci...
structure -
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CAS No:
2754-41-8
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Formula:
C10H8O6
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Chemical Name:
1,2,4,5-Cyclohexanetetracarboxylic aci...
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CAS No:
1,2,4,5-Cyclohexanetetracarboxylic aci... Basic Attributes
224.17
224.032089
DTXSID00560497
2932190090
Characteristics
86.7
-0.5
1.6±0.1 g/cm3
240°C(lit.)
517.5±50.0°C at 760 mmHg
238.6±30.2 °C
1.556
8.13E-11mmHg at 25°C
Safety Information
P264, P280, P302+P352, P305+P351+P338, P321, P332+P313, P337+P313, P362
H315
|Warning|H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]|P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, and P501|Aggregated GHS information provided by 2 companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
1,2,4,5-Cyclohexanetetracarboxylic aci... Use and Manufacturing
In a 100 mL three-necked flask equipped with a thermometer, a magnetic stirrer, a water separator, and a condenser tube was added 9.64 g of hydrogenatedEthylbenzene tetracarboxylate, 1mL of concentrated sulfuric acid, 5mL of acetic acid and 50mL of xylene were heated to 130°C. During the reaction, the reaction temperature was maintained at reflux, and the reaction continuously removed water for 5 hours. , cooling down to room temperature, suction filtration, filter cake washed with acetone, dried at room temperature under reduced pressure to give white solid 1, 2, 4, 5-cyclohexane tetracarboxylic acid anhydride 4.80g, yield: 82.8percent.39.2 g of hydrogenated pyromellitic acid (0.15 mol) having a purity of 99.50percent obtained in the step 1 was added to 500 mL four-necked flask , meanwhile adding 120 g of acetic anhydride (1.18 mol) and heating to reflux under a nitrogen atmosphere , to carry out Dehydration reaction for 1h. [0026] After the reaction was completed, the solution was cooled to precipitate white crystals and filtered. The filter cake was dried under reduced pressure to obtain 32.5 g of white solid hydrogenated pyromellitic dianhydride. The yield was 97.5percent and the purity of GC was 99.85percent.In a three-necked flask equipped with a thermometer, mechanical stirring, and reflux condenser, 100 g of hydrogenated pyromellitic acid and 800 g of acetic anhydride was refluxed for 1 h under protection of nitrogen. Cool to room temperature to precipitate crystals and separate the crystals.Using 50 g of acetic anhydride and drying, 68.9 g of 1, 2, 4, 5-cyclohexanetetracarboxylic dianhydride was obtained. Yield: 80percent.In a 500mL three-necked bottle equipped with a thermometer, magnetic stirrer, water separator, and condenser28.92g hydrogenated pyromellitic acid ester, 4.3mL concentrated sulfuric acid, 125mL acetic acid heated to 128 °C, During the reaction, the reaction continuously removes low-boiling components and reacts for 10 h. , cooling down to room temperature, suction filtration, filter cake washed with 15mL acetic acid, 120 ° C vacuum drying to yield white solid 1, 2, 4, 5-cyclohexane tetracarboxylic dianhydride 13.22g, yield: 76percent.
Computed Properties
Molecular Weight:224.17
XLogP3:-0.5
Hydrogen Bond Acceptor Count:6
Exact Mass:224.03208797
Monoisotopic Mass:224.03208797
Topological Polar Surface Area:86.7
Heavy Atom Count:16
Complexity:349
Undefined Atom Stereocenter Count:4
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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