635-10-9

Basic information

• Product Name: TETRAMETHYL PYROMELLITATE
• Synonyms: Pyromellitic acid tetramethyl ester;1,2,4,5-BENZENETETRACARBOXYLIC ACID, TETRAMETHYLESTER;Pyromellitic acid tetramethyl ester~Tetramethyl benzene-1,2,4,5-tetracarboxylate;tetramethyl benzene-1,2,4,5-tetracarboxylate;1,2,4,5-Benzenetetracarboxylic acid tetramethyl;1,2,4,5-Tetra(methoxycarbonyl)benzene;1,2,4,5-Tetramethoxycarbonylbenzene;Pyromellitic acid tetramethyl
• CAS NO: 635-10-9
• Molecular Formula: C₁₄H₁₄O₈
• Molecular Weight: 310.26
• EINECS: 211-226-6
• Mol File: 635-10-9.mol
• Article Data: 15

Chemical Properties

• Melting Point: 143-144°C
• Boiling Point: 410.43°C (rough estimate)
• Flash Point: 161.5°C
• Appearance: /
• Density: 1.4258 (rough estimate)
• Vapor Pressure: 1.07E-05mmHg at 25°C
• Refractive Index: 1.5500 (estimate)
• Merck: 14,8004
• BRN: 2226326
• CAS DataBase Reference: TETRAMETHYL PYROMELLITATE(CAS DataBase Reference)
• NIST Chemistry Reference: TETRAMETHYL PYROMELLITATE(635-10-9)
• EPA Substance Registry System: TETRAMETHYL PYROMELLITATE(635-10-9)

Safety Data

• Safety Statements: S22:Do not inhale dust.; S24/25:Avoid contact with skin and eyes.
• Hazardous Substances Data: 635-10-9(Hazardous Substances Data)

Usage

General Description

Tetramethyl pyromellitate is an organic compound with the chemical formula C14H18O8. It is a member of the pyromellitic dianhydride family, and is commonly used as a cross-linking agent in the production of ultra-high-performance epoxy and polyimide resins. It is also used as a stabilizer in the production of polyesters and as a component in the formulation of specialty adhesives and coatings. Tetramethyl pyromellitate is a white solid that is insoluble in water, but soluble in organic solvents. It is known for its high thermal stability and is considered to be non-toxic.

InChI:InChI=1/C14H14O8/c1-19-11(15)7-5-9(13(17)21-3)10(14(18)22-4)6-8(7)12(16)20-2/h5-6H,1-4H3

Upstream product

• 67-56-1 methanol 
• 89-05-4 1,2,4,5-benzenetetracarboxylic acid 
• 186581-53-3 diazomethane 
• 262-83-9 cyclooctanaphthalene 
• 95-94-3 1,2,4,5-tetrachlorobenzene 
• 201230-82-2 carbon monoxide 
• 124-41-4 sodium methylate 
• 120-61-6 1,4-benzenedicarboxylic acid dimethyl ester 
• 124-38-9 carbon dioxide 
• 6995-21-7 α-Methyl-β-(3,4-dimethyl-6-isopropyl-benzoyl)-propionsaeure 
• 149-73-5 trimethyl orthoformate 
• 292638-85-8 acrylic acid methyl ester 
• 762-42-5 dimethyl acetylenedicarboxylate 
• 67402-74-8 2,4,5-tris(methoxycarbonyl)benzoic acid 

Downstream Products

• 4210-46-2 tetrakis(2,2,6,6-tetramethyl-1-oxyl-4-piperidyloxy)pyromellitate 
• 941569-69-3 N,N',N'',N'''-1,2,4,5-tetra(2-hydroxyethyl)-pyromellitamide 
• 92298-55-0 cyclohexane-1,2,4,5-tetracarboxylic acid tetramethyl ester 
• 2754-41-8 1,2,4,5-cyclohexanetetracarboxylic acid-1,2:4,5-dianhydride 
• 110055-04-4 1,2,4,5-tetrakis-acetoxymethyl-benzene 
• 624286-71-1 cis,cis,cis-1,2,4,5-cyclohexanetetracarboxylic acid 
• 322764-84-1 cis,cis,cis-tetramethyl 1,2,4,5-cyclohexanetetracarboxylate 
• 1204-76-8 1,2,4,5-tetrakis(hydroxymethyl)benzene 

Relevant articles and documents

Synthesis of Core-Modified Third-Generation Light-Driven Molecular Motors

The synthesis and characterization of a series of light-driven third-generation molecular motors featuring various structural modifications at the central aromatic core are presented. We explore a number of substitution patterns, such as 1,2-dimethoxybenzene, naphthyl, 1,2-dichlorobenzene, 1,1′:2′,1″-terphenyl, 4,4″-dimethoxy-1,1':2′,1″-terphenyl, and 1,2-dicarbomethoxybenzene, considered essential for designing future responsive systems. In many cases, the synthetic routes for both synthetic intermediates and motors reported here are modular, allowing for their post-functionalization. The structural modifications introduced in the core of the motors result in improved solubility and a bathochromic shift of the absorption maxima. These features, in combination with a structural design that presents remote functionalization of the stator with respect to the fluorene rotors, make these novel motors particularly promising as light-responsive actuators in covalent and supramolecular materials.

Synthesis method for 1,2,4,5-cyclohexanetetracarboxylic dianhydride

The invention provides a preparation method for 1,2,4,5-cyclohexanetetracarboxylic dianhydride. The method comprises the following steps: preparing pyromellitic acid ester by reacting pyromellitic acid with an esterification reagent; synthesizing hydrogenated pyromellitic acid ester by adding the pyromellitic acid ester with hydrogen in a fixed bed reactor; obtaining the 1,2,4,5-cyclohexanetetracarboxylic dianhydride by synthesizing the hydrogenated pyromellitic acid ester in strong acids and organic solvents. Compared with a traditional production process, the esterification reaction of the invention has high efficiency, the service life of a catalyst is prolonged, continuous production of hydrogenation reaction is realized, and a process route is shortened. The method has the advantagesof simple operation, high production efficiency and low cost and the like. The content of metal ions (sodium, potassium, iron, calcium, aluminum, and zinc) of the obtained 1,2,4,5-cyclohexanetetracarboxylic dianhydride contains is equal to or less than 1 ppm, and meets requirements of electronic grade products.

Highly chemoselective palladium-catalyzed cross-trimerization between alkyne and alkenes leading to 1,3,5-trienes or 1,2,4,5-tetrasubstituted benzenes with dioxygen

A palladium-catalyzed 1:2 linear/cyclic cross-trimerization of alkyne with alkenes using molecular oxygen as the sole oxidant has been reported for the first time. A series of 1,3,5-trienes and 1,2,4,5-tetrasubstituted benzenes are obtained with high chemoselectivity respectively and mechanisms of these reactions are proposed based on some controlled examination.