944-38-7

Basic information

• Product Name: 1,2-Benzenedicarboxylic acid, 3,6-dimethyl-
• CAS NO: 944-38-7
• Molecular Formula: C10H10O4
• Molecular Weight: 194.187
• Mol File: 944-38-7.mol
• Article Data: 5

Chemical Properties

• CAS DataBase Reference: 1,2-Benzenedicarboxylic acid, 3,6-dimethyl-(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2-Benzenedicarboxylic acid, 3,6-dimethyl-(944-38-7)
• EPA Substance Registry System: 1,2-Benzenedicarboxylic acid, 3,6-dimethyl-(944-38-7)

Safety Data

• Hazardous Substances Data: 944-38-7(Hazardous Substances Data)

Usage

General Description

1,2-Benzenedicarboxylic acid, 3,6-dimethyl-, also known as dimethyl isophthalate, is a chemical compound with the molecular formula C10H12O4. It is a derivative of isophthalic acid and is commonly used in the production of polymers and resins. Dimethyl isophthalate is a clear, colorless liquid with a mild, fruity odor, and it is soluble in organic solvents like ethanol and ether. It is often used as a building block in the synthesis of polyester resins, which are used in the production of coatings, adhesives, and fabrics. Additionally, dimethyl isophthalate is utilized as a plasticizer in the manufacturing of vinyl and other polymers to improve flexibility and durability. Despite its importance in industrial applications, dimethyl isophthalate can be hazardous if ingested or inhaled and should be handled with caution in a controlled environment.

Upstream product

• 478-59-1 isohyposantonin 
• 478-58-0 hyposantonin 
• 37902-49-1 dimethyl 3,6-dimethylphthalate 
• 201230-82-2 carbon monoxide 
• 610-72-0 2,5-dimethylbenzoic acid 
• 52436-54-1 exo-cis-1,7-dimethyl-4,10-dioxatricyclo[5.2.1.0^2,6]dec-8-ene-3,5-dione 
• 77880-59-2 1,4-dimethyl-7-oxabicyclo<2.2.1>hept-5-ene-2,3-dicarboxylic anhydride 
• 625-86-5 2,5-dimethylfuran 
• 108-38-3 m-xylene 
• 861595-20-2 2,2-diethyl-4,6-dimethyl-indan-1,3-dione 
• 7697-37-2 nitric acid 
• 5463-50-3 3,6-dimethyl phthalic anhydride 

Downstream Products

• 106-42-3 para-xylene 

Relevant articles and documents

Inclusion complex containing epoxy resin composition for semiconductor encapsulation

The invention is an epoxy resin composition for sealing a semiconductor, including (A) an epoxy resin and (B) a clathrate complex. The clathrate complex is one of (b1) an aromatic carboxylic acid compound, and (b2) at least one imidazole compound represented by formula (II): wherein R2 represents a hydrogen atom, C1-C10 alkyl group, phenyl group, benzyl group or cyanoethyl group, and R3 to R5 represent a hydrogen atom, nitro group, halogen atom, C1-C20 alkyl group, phenyl group, benzyl group, hydroxymethyl group or C1-C20 acyl group. The composition has improved storage stability, retains flowability when sealing, and achieves an effective curing rate applicable for sealing delicate semiconductors.

On the Diels-Alder approach to solely biomass-derived polyethylene terephthalate (PET): Conversion of 2,5-dimethylfuran and acrolein into p-xylene

Polyethylene terephthalate (PET) is a polymeric material with high global demand. Conventionally, PET is produced from fossil-fuel-based materials. Herein, we explored the feasibility of a sustainable method for PET production by using solely bio-renewable resources. Specifically, 2,5-dimethylfuran (derived from lignocellulosic biomass through 5-(hydroxymethyl)furfural) and acrolein (produced from glycerol, a side product of biodiesel production) were converted into the key intermediate p-xylene (a precursor of terephthalic acid). This synthesis consists of a sequential Diels-Alder reaction, oxidation, dehydration, and decarboxylation. In particular, the pivotal first step, the Diels-Alder reaction, was studied in detail to provide useful kinetic and thermodynamic data. Although it was found that this reaction requires low temperature to proceed efficiently, which presents a limitation on economic feasibility on an industrial scale, the concept was realized and bio-derived p-xylene was obtained in 34 % overall yield over four steps. Making PET as green as grass: Polyethylene terephthalate (PET) can be prepared from solely bio-renewable sources by converting 2,5-dimethylfuran and acrolein into the key intermediate p-xylene (see scheme). This atom-economic route consists of a sequential Diels-Alder reaction, oxidation, dehydrative aromatization and decarboxylation. We examined the feasibility of this process with an emphasis on the Diels-Alder reaction step. Copyright

Formation of 1,1,3,3-tetrafluoro-1,3-dihydroisobenzofurans in reactions of phthalic acids with sulphur tetrafluoride. Evaluation of the steric and electronic effects of the substituents

4,5-Dinitrophthalic acid and 3,6-dimethylphthalic anhydride have been reacted with sulphur tetrafluoride to give mixtures of the corresponding bis(trifluoromethyl)benzenes and 1,1,3,3-tetrafluoro-1,3-dihydroisobenzofurans in a 5:1 and 1:3.6 ratio, respectively.These and earlier results on the reactions of sulphur tetrafluoride with substituted and unsubstituted phthalic and pyromellitic acids are compared and structural factors in the acids influencing the competitive formation of cyclic and non-cyclic products discussed.The stability of 1,1,3,3-tetrafluoro-1,3-dihydroisobenzofurans against cleavage by anhydrous hydrogen fluoride has also been investigated.