2754-41-8

Basic information

• Product Name: HPMDA
• Synonyms: 1,2,4,5-Cyclohexanetetracarboxylic acid dianhydride;1,2,4,5-Cyclohexanetetracarboxylic dianhydride;HPMDA;1,2,4,5-cyclohexanetetrcarboxylic dianhydride(HPMDA);1,2,4,5-cyclohexanetetracarboxylic dianhydride (HPMDA);Tetrahydrobenzo[1,2-c:4,5-c']difuran-1,3,5,7(3aH,7aH)-tetraone;Colorless Pi;1,2,4,5-Cyclohexanetetracarboxylic Dianhydride (purified by sublimation)
• CAS NO: 2754-41-8
• Molecular Formula: C₁₀H₈O₆
• Molecular Weight: 224.16692
• EINECS: 1312995-182-4
• Mol File: 2754-41-8.mol
• Article Data: 6

Chemical Properties

• Melting Point: 240°C(lit.)
• Boiling Point: 517.531 °C at 760 mmHg
• Flash Point: 238.633 °C
• Appearance: /
• Density: 1.567
• Storage Temp.: under inert gas (nitrogen or Argon) at 2-8°C
• Solubility: soluble in Acetone
• CAS DataBase Reference: HPMDA(CAS DataBase Reference)
• NIST Chemistry Reference: HPMDA(2754-41-8)
• EPA Substance Registry System: HPMDA(2754-41-8)

Safety Data

• Hazardous Substances Data: 2754-41-8(Hazardous Substances Data)

Usage

Uses

1,2,4,5-Cyclohexanetetracarboxylic dianhydride can be used as organic synthesis intermediates and pharmaceutical intermediates, mainly used in laboratory research and development and chemical and pharmaceutical production processes.

Synthesis

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: 82.8%.

Upstream product

• 15383-49-0 cyclohexane-1e,2a,4a,5e-tetracarboxylic acid 
• 94253-98-2 tetraethyl 1,2,4,5-cyclohexanetetracarboxylate 
• 6634-01-1 1,2,4,5-benzenetetracarboxylic acid ethyl ester 
• 89-05-4 1,2,4,5-benzenetetracarboxylic acid 
• 92298-55-0 cyclohexane-1,2,4,5-tetracarboxylic acid tetramethyl ester 
• 635-10-9 tetramethyl 1,2,4,5-benzenetetracarboxylate 
• 89-32-7 Pyromellitic dianhydride 

Downstream Products

• 46299-83-6 1,2,4,5-Tetrakis-hydroxymethyl-cyclohexan 

Relevant articles and documents

METHOD FOR PRODUCING 1,2,4,5-CYCLOHEXANETETRACARBOXYLIC DIANHYDRIDE

An object of the present invention is to provide a method for producing 1,2,4,5-cyclohexanetetracarboxylic dianhydride, which is capable of stably achieving a high dehydration rate. The method for producing 1,2,4,5-cyclohexanetetracarboxylic dianhydride of the present invention is a method for producing 1,2,4,5-cyclohexanetetracarboxylic dianhydride by subjecting 1,2,4,5-cyclohexanetetracarboxylic acid to a dehydration reaction in a slurry state in the presence of a dehydrating agent, wherein an average particle size of the 1,2,4,5-cyclohexanetetracarboxylic acid is 20 μm or more.

Electronic grade hydrogenation of pyromellitic acid dianhydride preparation method (by machine translation)

The invention discloses a preparation method of electronic grade hydrogenated pyromellitic dianhydride. The method comprises the following steps: adding commercially available pyromellitic dianhydride with the purity greater than or equal to 98.0%, deionized water and a noble metal catalyst into an autoclave; feeding hydrogen into the autoclave and simultaneously carrying out a hydrolysis reaction and a catalytic hydrogenation reaction; carrying out aftertreatment after the reactions so as to obtain crude hydrogenated pyromellitic dianhydride; decoloring and refining crude hydrogenated pyromellitic dianhydride with deionized water and activated carbon so as to obtain hydrogenated pyromellitic dianhydride with the purity greater than or equal to 99.5%; finally, carrying out a dehydration reaction on hydrogenated pyromellitic dianhydride by using acetic anhydride so as to obtain electronic grade hydrogenated pyromellitic dianhydride with the purity greater than or equal to 99.85%. According to the method, the purity of prepared hydrogenated pyromellitic dianhydride can reach above 99.85%, and the content of single metal ions (such as sodium, potassium, calcium, iron, copper, aluminum and the like) in prepared hydrogenated pyromellitic dianhydride is respectively less than 1ppm. Thus, electronic grade hydrogenated pyromellitic dianhydride can be widely applied to the field of photoelectronics, micro-electronics and other high and new technologies.

Compounds, polymers, resin compositions and nonlinear optical devices

The present invention provides, as heteroaromatic compounds made functional so as to be used for nonlinear optical materials, compounds represented by the following general formula (1), and also provides polymers obtained from these and nonlinear optical parts comprising such polymers. In the formula, Ar1 and Ar2 each represents a divalent aromatic group; R1, R2 and R3 each represents an atom or a group independently selected from a hydrogen atom or an alkyl group and an aromatic group; X1 represents a monovalent organic group; n represents an integer of 2 to 12; and Z1 and Z2 each represents a group independently selected from electron attractive functional groups.