cas 125-20-2, Thymolphthalein | Articles data

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NbCl5 Promoted the Efficient Synthesis of Phthalein Derivatives: Optical Characterization and Solvatochromic Effect
Organic dyes derived from phthaleins have a large number of industrial applications and can be synthesized using a Lewis acid by Friedel–Crafts acylation, followed by an addition reaction to the carbonyl compound. This work aims to investigate the use of NbCl5 as a catalyst for the acylation reaction. The behavior of the phthalein derivatives in several solvents and when subjected to different pH conditions was studied. These compounds showed a color-changing effect depending on the pH and solvent, making them useful for applications as indicators. The phthaleins change their conformations depending on the condition of the medium. Photophysical studies of these compounds were carried out through their UV–Vis absorption spectra. Here, we show the umbrella-like conformation change of phthalein derivatives that depend on the solvent and the pH of the medium.
Moreno, Vitor Fernandes,dos Santos, Giovanny Carvalho,da Costa, Gyordanna Mayara Gaspar,Gomes, Marcelo Henrique Ayala,Silva-Filho, Luiz Carlos da
p. 2811 - 2821
(2019)
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A facile synthesis of phthalein indicator dyes
The use of methanesulfonic acid offers a novel and highly efficient method for the synthesis of phthalein indicator dyes in excellent yields on an industrial scale.
Sabnis, Ram W.
experimental part
p. 6261 - 6263
(2010/01/11)

AROMATIC ESTERS FOR MARKING OR TAGGING ORGANIC PRODUCTS
A compound represented by formula I is used as a marker for organic products. wherein Ar1 and Ar2 each independently represent a substituted or unsubstituted phenylene group or a substituted or unsubstituted naphthylene group; R1 represents a straight or branched chain alkyl group having 1 to 22 carbon atoms; R2 represents a hydrogen atom or a group of the formula C(O)R4 where R4 is a hydrogen atom or a straight or branched chain alkyl group having 1 to 22 carbon atoms; and R3 represents a hydrogen atom, a straight or branched chain alkyl group having 1 to 12 carbon atoms, a straight or branched chain alkoxy group having 1 to 12 carbon atoms, a hydroxyl group, or a substituted or unsubstituted phenyl group or a substituted or unsubstituted naphthyl group; and Z represents a hydrogen atom or a group of atoms that combine with Ar2 or R3 to form a lactone ring.
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Page/Page column 9

(2008/06/13)

Chemical Properties

Appearance/Colour :white fine crystalline powder
Melting Point: 251-253 °C(lit.)
Boiling Point: 571.6 °C at 760 mmHg
Flash Point:187.5 °C
Density: 1.187 g/cm³
Solubility:ethanol: clarity passes test
Storage Temp.:Store at RT.
Vapor Pressure: 1.15E-13mmHg at 25°C
Refractive Index: 1.612
PKA: 9.70, 10.0(at 25℃)
Merck: 14,9401
BRN: 359413
PSA: 66.76000
LogP: 6.42370

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Chemical Properties

Appearance/Colour :white fine crystalline powder

Melting Point: 251-253 °C(lit.)

Boiling Point: 571.6 °C at 760 mmHg

Flash Point:187.5 °C

Density: 1.187 g/cm³

Solubility:ethanol: clarity passes test

Storage Temp.:Store at RT.

Vapor Pressure: 1.15E-13mmHg at 25°C

Refractive Index: 1.612

PKA: 9.70, 10.0(at 25℃)

Merck: 14,9401

BRN: 359413

PSA: 66.76000

LogP: 6.42370

Global suppliers and manufacturers of 125-20-2total 136 suppliers on LookChem

Article Database

125-20-2

Articles about 125-20-2Total 3 be found

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Chemical Properties

Appearance/Colour :white fine crystalline powder

Melting Point: 251-253 °C(lit.)

Boiling Point: 571.6 °C at 760 mmHg

Flash Point:187.5 °C

Density: 1.187 g/cm3

Solubility:ethanol: clarity passes test

Storage Temp.:Store at RT.

Vapor Pressure: 1.15E-13mmHg at 25°C

Refractive Index: 1.612

PKA: 9.70, 10.0(at 25℃)

Merck: 14,9401

BRN: 359413

PSA: 66.76000

LogP: 6.42370

Global suppliers and manufacturers of 125-20-2total 136 suppliers on LookChem

Density: 1.187 g/cm³