12239-15-5

Basic information

• Product Name: Acid Yellow 49
• Synonyms: 4-[(5-amino-3-methyl-1-phenyl-1H-pyrazol-4-yl)azo]-2,5-dichlorobenzenesulphonic acid;C.I.AcidYellow49;Benzenesulfonic acid, 4-(5-amino-3-methyl-1-phenyl-1H-pyrazol-4-yl)azo-2,5-dichloro-;2,5-Dichloro-4-[(5-amino-3-methyl-1-phenyl-1H-pyrazol-4-yl)azo]benzenesulfonic acid;4-[(5-amino-3-methyl-1-phenyl-1H-pyrazol-4-yl)azo]-2,5-dichloro-Benzenesulfonic acid;Acid yellow 49 (C.I. 18640);Acid Fast Yellow NFG;Aminyl Yellow E-3GL
• CAS NO: 12239-15-5
• Molecular Formula: C₁₆H₁₃Cl₂N₅O₃S
• Molecular Weight: 426.27712
• EINECS: 235-473-4
• Product Categories: Organics
• Mol File: 12239-15-5.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 613.74℃[at 101 325 Pa]
• Appearance: /
• Density: 1.62 g/cm³
• Vapor Pressure: 0Pa at 25℃
• Refractive Index: 1.719
• Water Solubility: 273.4μg/L at 25℃
• CAS DataBase Reference: Acid Yellow 49(CAS DataBase Reference)
• NIST Chemistry Reference: Acid Yellow 49(12239-15-5)
• EPA Substance Registry System: Acid Yellow 49(12239-15-5)

Safety Data

• Hazardous Substances Data: 12239-15-5(Hazardous Substances Data)

Usage

Preparation

4-Amino-2,5-dichlorobenzenesulfonic acid diazo, and 3-Methyl-1-phenyl-1H-pyrazol-5-amine?coupling.

Flammability and Explosibility

Notclassified

Properties and Applications

brilliant yellow. This applies to goods wool, silk, polyamide fiber and wool blended fabric dyeing, good levelness and also can be used for leather color. Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater Fading Stain Fading Stain Fading Stain ISO 5-6 2-3 3 3 3 3-4 3 2-3

Standard

Light Fastness

Fading

Stain

ISO

5-6

InChI:InChI=1/C16H13Cl2N5O3S/c1-9-15(16(19)23(22-9)10-5-3-2-4-6-10)21-20-13-7-12(18)14(8-11(13)17)27(24,25)26/h2-8H,19H2,1H3,(H,24,25,26)

Upstream product

• 88-50-6 1-amino-2,5-dichlorobenzene-4-sulphonic acid 
• 1131-18-6 1-Phenyl-3-methyl-5-aminopyrazole 
• 88-54-0 2,5-Dichloro-4-sulfo-benzenediazonium; chloride 

Relevant articles and documents

The Influence of Chlorine and Sulphonate Substituents on the Visible Absorption Maxima of Some Azo Dyes

A total of 110 arylazo dyes have been prepared, based on five benzenoid and heterocyclic coupling components, and containing combinations of chlorine and sulphonate (sulpho) substituents in the diazo components.Their visible absorption maxima have been analysed in order to determine the degree to which chloro and sulfo substituent influences are constant and transferable, both within a series, and between series.Additivity is found to pertain, if allowances are made for steric effects.A 2-sulpho group alone can induce nonplanarity, depending on the nature of the coupling component.The 2-sulpho-3-chloro combination is particularly responsible for hypsochromic shifts unexpected on the basis of strict additivity.Computer-aided molecular modelling studies have clarified the steric interactions present.Di-ortho-substitution also induces nonplanarity and hypsochromic effects.There is some evidence for non-equivalence of a substituent in the two distinct meta-orientations, although MO calculations do not reproduce this behaviour.