554-73-4 Usage
Chemical Properties
yellow-brown or orange powder
Uses
As indicator. pH: red 1.4 to yellow 2.6.
Preparation
ommonly known as acidic orange IV. 4-Aminobenzenesulfonic acid diazo, with Diphenylamine coupling.
Properties and Applications
yellow orange. Soluble in water and ethanol for orange, slightly soluble in ethyl ether, insoluble in benzene. The strong sulfuric acid is purple, dilute appears after the purple precipitation. In water solution to join hydrochloric acid appear purple precipitation; With sodium hydroxide appear yellow precipitation. Used for wool, silk, cotton, vinegar fiber etc fiber dyeing. Can also be used to indicator, paper, soap kind, straw and leather color. Good levelness, discharge sex medium, dyeing encounter copper, iron ion color shade darker.
Standard
Light Fastness
Soaping
Persperation Fastness
Oxygen bleaching
Fastness to seawater
Fading
Stain
Fading
Stain
Fading
Stain
ISO
3
1-2
2
1-2
1-2
Standard
Light Fastness
Fading
Stain
ISO
3
Purification Methods
Recrystallise it twice from water [Kolthoff & Gus J Am Chem Soc 60 2516 1938]. [Beilstein 16 II 171.]
Check Digit Verification of cas no
The CAS Registry Mumber 554-73-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,5 and 4 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 554-73:
(5*5)+(4*5)+(3*4)+(2*7)+(1*3)=74
74 % 10 = 4
So 554-73-4 is a valid CAS Registry Number.
InChI:InChI=1/C18H15N3O3S.Na/c22-25(23,24)18-12-10-17(11-13-18)21-20-16-8-6-15(7-9-16)19-14-4-2-1-3-5-14;/h1-13,19H,(H,22,23,24);/q;+1/p-1
554-73-4Relevant articles and documents
Molecular recognition studies on supramolecular systems. 32. Molecular recognition of dyes by organoselenium-bridged bis(β-cyclodextrin)s
Liu,Li,You,Wada,Inoue
, p. 225 - 232 (2007/10/03)
A series of novel bis(β-cyclodextrin)s tethered with organoselenium linkers, i.e., 6,6′-(o-phenylenediseleno)-bridged bis(β-cyclodextrin) (2), 6,6′-[2,2′-diselenobis(benzoyloxy)]-bridged bis(β-cyclodextrin) (3), and 6,6′-[2,2′-diselenobis[2-(benzoylamino)ethylamino]]-bridged bis(β-cyclodextrin) (4), were synthesized from β-cyclodextrin (1). The inclusion complexation behavior of 1-4 with some dyes, such as 8-anilinonaphthalenesulfonate (ANS), Brilliant Green, Crystal Violet, Tropaeolin OO, Auramine O, and Methyl Orange, was investigated in aqueous phosphate buffer solution (pH 7.20) at 25 °C by UV-vis, fluorescence, and circular dichroism spectrometry, as well as fluorescence lifetime measurements. The complex stability constants (KS) and Gibbs free energy changes (δG°) for the stoichiometric 1:1 inclusion complexation of 1-4 with the dyes were obtained by the spectrophotometric or spectropolarimetric titrations. The bis(β-cyclodextrin)s 2-4 showed much higher affinities toward these guest dyes than native β-cyclodextrin I with fairly good molecular selectivities. The cooperative binding abilities of these bis(β-cyclodextrin)s are discussed from the viewpoints of size/shape-fit interaction, induced-fit concept, and multiple recognition mechanism.
