4659-48-7

Basic information

• Product Name: 3,3',4,4'-TETRAMETHYL BENZOPHENONE
• Synonyms: 1-(3,4-Dimethylbenzoyl)-3,4-dimethylbenzene;Bis(3,4-dimethylphenyl)methanone
• CAS NO: 4659-48-7
• Molecular Formula: C₁₇H₁₈O
• Molecular Weight: 238.3242
• Mol File: 4659-48-7.mol
• Article Data: 6

Chemical Properties

• Melting Point: 140 °C
• Boiling Point: 387.6 °C at 760 mmHg
• Flash Point: 168.6 °C
• Appearance: /
• Density: 1.024 g/cm³
• Vapor Pressure: 3.25E-06mmHg at 25°C
• Refractive Index: 1.561
• CAS DataBase Reference: 3,3',4,4'-TETRAMETHYL BENZOPHENONE(CAS DataBase Reference)
• NIST Chemistry Reference: 3,3',4,4'-TETRAMETHYL BENZOPHENONE(4659-48-7)
• EPA Substance Registry System: 3,3',4,4'-TETRAMETHYL BENZOPHENONE(4659-48-7)

Safety Data

• Hazardous Substances Data: 4659-48-7(Hazardous Substances Data)

Usage

General Description

3,3',4,4'-Tetramethyl Benzophenone is a chemical compound primarily used as a photoinitiator in the processing of printing inks and varnishes. It is known for its photostability, and upon exposure to ultraviolet light, it generates radicals that contribute to the curing of polymers and resins. 3,3',4,4'-Tetramethyl Benzophenone is characterized by its two benzene rings fused together with four methyl groups attached, and its formula is C16H16O. Due to its uses, it is commonly found in industrial settings and is handled with care to prevent exposure and potential health hazards.

InChI:InChI=1/C17H18O/c1-11-5-7-15(9-13(11)3)17(18)16-8-6-12(2)14(4)10-16/h5-10H,1-4H3

Upstream product

• 56-23-5 tetrachloromethane 
• 6578-78-5 1,1-bis(3,4-dimethylphenyl)ethylene 
• 6460-66-8 2,2-bis(3,4-dimethylphenyl)acetic acid 
• 95-47-6 o-xylene 
• 21900-23-2 3,4-dimethylbenzoyl chloride 
• 20809-71-6 Methyl-2,2-bis-<3,4-dimethyl-phenyl>-3-oxo-succinat 
• 5973-71-7 3,4-dimethylbenzaldehyde 
• 583-71-1 4-bromo-o-xylene 
• 32315-10-9 bis(trichloromethyl) carbonate 
• 31599-61-8 3,4-dimethyliodobenzene 
• 13939-06-5 molybdenum hexacarbonyl 

Downstream Products

• 101583-78-2 3,4,3',4'-tetramethyl-benzophenone oxime 
• 2479-49-4 3,3',4,4'-benzophenonetetracarboxylic acid 
• 1200132-82-6 3,3',4'-trimethylbenzophenone-4-carboxylic acid 
• 4659-50-1 3-methylbenzophenone-3',4,4'-tricarboxylic acid 

Relevant articles and documents

Solution-Processable n-Type Organic Semiconductors Based on Angular-Shaped 2-(12 H -Dibenzofluoren-12-ylidene)malononitrilediimide

The angular-shaped n-type semiconductors 2-(12H-dibenzofluoren-12-ylidene)malononitrilediimide 2a and 2b were successfully designed, synthesized, and fully characterized by optical absorption and fluorescence, cyclic voltammetry, X-ray crystal structure a

Development and optimization of producing 3,3′, 4,4′-benzophenonetetracarboxylic dianhydride

This paper includes a series of experiments conducted in order to develop a laboratory method for producing 3,3′, 4,4′-benzophenonetetracarboxylic dianhydride and selection of the optimum conditions, allowing to obtain the greatest yield. 3,3′, 4,4′-benzophenonetetracarboxylic dianhydride is used for the preparation of polyimides with high thermal stability, chemical resistance as well as high strength and high Young's modulus. Benzophenonetetracarboxylic dianhydride was prepared by multistep route: Friedel-Crafts alkylation of o-xylene to obtain 3,3′, 4,4′-tetramethyl benzophenone followed by liquid phase oxidation to benzophenonetetracarboxylic acid and dehydration.

One-pot synthesis preparation of 3,3 the [...], 4,4 the benzophenone-tetraalkyl [...] method of

The invention discloses a method for preparing 3,3',4,4'-tetraalkyl benzophenone by a one-pot method and belongs to the field of chemical synthesis. The method comprises the steps of mixing o-dialkylphenyl, which serves as a raw material, and Lewis acid and concentrated sulfuric acid, which serve as catalysts, so as to form a mixed liquid, dropwise adding carbon tetrachloride into the mixed liquid, and carrying out heat preservation for 0.5-5 hours at the temperature of 0-30 DEG C after the dropwise adding is completed. Compared with the prior art, the method disclosed by the invention has the advantages that a two-step synthesis method is simplified into the one-pot method, so that the process is simplified, the operation is simpler and more convenient, the product can be obtained by one-step aftertreatment only, and the productivity is increased. Furthermore, the method has low requirements on temperature, the whole process does not need heating or cooling, no special requirements on equipment exist, and the operation is safe, simple and convenient.