509-77-3

Basic information

• Product Name: 3,3-bis(4-aminophenyl)phthalide
• Synonyms: 3,3-bis(4-aminophenyl)phthalide;3,3-Bis(4-aminophenyl)-1(3H)-isobenzofuranone;3,3-Bis(4-aminophenyl)isobenzofuran-1(3H)-one;4,4'-(3-Oxo-1,3-dihydroisobenzofuran-1,1-diyl)bisaniline;3,3-bis(4-aminophenyl)-2-benzofuran-1-one;3,3-bis(4-aminophenyl)isobenzofuran-1-one;3,3-bis(4-azanylphenyl)-2-benzofuran-1-one;Anilinephthalein
• CAS NO: 509-77-3
• Molecular Formula: C₂₀H₁₆N₂O₂
• Molecular Weight: 316.35324
• EINECS: 208-105-5
• Mol File: 509-77-3.mol
• Article Data: 2

Chemical Properties

• Melting Point: 203°
• Boiling Point: 565.1 °C at 760 mmHg
• Flash Point: 271 °C
• Appearance: /
• Density: 1.332 g/cm³
• Vapor Pressure: 8.63E-13mmHg at 25°C
• Refractive Index: 1.71
• CAS DataBase Reference: 3,3-bis(4-aminophenyl)phthalide(CAS DataBase Reference)
• NIST Chemistry Reference: 3,3-bis(4-aminophenyl)phthalide(509-77-3)
• EPA Substance Registry System: 3,3-bis(4-aminophenyl)phthalide(509-77-3)

Safety Data

• Hazardous Substances Data: 509-77-3(Hazardous Substances Data)

Usage

General Description

3,3-bis(4-aminophenyl)phthalide, also known as bis(4-aminophenyl)phthalide, is a chemical compound that is commonly used in organic synthesis and as a dye intermediate. It is an off-white to yellow crystalline powder with a molecular formula of C20H16N2O2. 3,3-bis(4-aminophenyl)phthalide is often utilized in the production of dyes and pigments, as well as in pharmaceuticals and other organic chemical reactions. It is known for its ability to produce vibrant and long-lasting colors, making it a valuable component in various industrial and commercial applications. Additionally, it has been studied for its potential use in organic materials and optoelectronic devices due to its interesting electronic and photophysical properties.

InChI:InChI=1/C20H16N2O2/c21-15-9-5-13(6-10-15)20(14-7-11-16(22)12-8-14)18-4-2-1-3-17(18)19(23)24-20/h1-12H,21-22H2

Upstream product

• 88-95-9 Phthaloyl dichloride 
• 102-07-8 bis(diphenyl)urea 
• 1140964-66-4 3,3-bis(4-(trifluoromethylsulfonyloxy)phenyl)-1(3H)-isobenzofuranone 
• 601-70-7 3,3-dichlorophthalide 
• 603-54-3 N,N-diphenylurea 

Downstream Products

• 77-09-8 phenolphthalein 
• 861017-56-3 3,3-bis-(4-benzenesulfonylamino-phenyl)-phthalide 

Relevant articles and documents

Gas transport coefficients of phthalide-containing high-Tg glassy polymers determined by gas-flux and NMR measurements

The synthesis of three aromatic polymers containing phthalide cardo groups having high inherent viscosities is described. Polyimides PIC-6F and PIC-TB were prepared from a cardo diamine and two different dianhydrides, and poly(phthalidylidenearylene) (PPDAr) was prepared by a precipitative Friedel-Crafts homopolycondensation of 3-(4-biphenylyl)-3-chlorophthalide. All polymers presented high glass transition temperatures varying between 600 and 690 K. Dense membranes prepared by casting from N,N-dimethylacetamide solutions exhibited good mechanical properties and decomposition temperatures over 770 K under a N2 atmosphere. Results of gas transport measurements of O2, N2, and CO2 were comparatively analyzed based on the chemical structure of the polymers. Additionally, the solubility, diffusion, and permeability coefficients of [13C]O2 in these membranes were determined by 13C NMR spectroscopy and pulsed-field gradient NMR measurements, and the results were in good agreement with those determined with pressure-driven measurements. It was found that membranes of PPDAr exhibited the highest permeability and CO2/N2 and CO2/O2 permselectivities.