81-77-6 Usage
Chemical Properties
blue needles with a metallic lustre
Uses
Different sources of media describe the Uses of 81-77-6 differently. You can refer to the following data:
1. Mainly to dye cotton.
2. Indanthrone (Pigment Blue 60) functions as a blue pigment or as a dye.
3. Dinaphtho[2,3-a:2'',3''-h]phenazine-5,9,14,18(6H,15H)-tetraone is a pigment; used in preparation of Polyethylene composite material for outdoor building materials.
Preparation
(a) in potassium nitrate, LvSuanJia, glucose or organic acid salt (such as formic acid potassium or acetic acid potassium or the mixture of both) under the existence of, with potassium hydroxide treatment 2-Aminoanthracene-9,10-dione;
Definition
A blue vat dye or pigment. The molecule consists of
two anthraquinone nuclei linked through two –NH
groups.
Reactions
As a pigment, indanthrone is a particulate, insoluble solid dispersed directly into a vehicle, whereas as a dye it is reduced to a base-soluble hydroquinone derivative and then reoxidized onto a solid substrate.
General Description
Blue needles with a metallic luster or fine fluffy deep blue powder.
Air & Water Reactions
Insoluble in water.
Fire Hazard
Flash point data for Vat Blue 4 are not available. Vat Blue 4 is probably combustible.
Flammability and Explosibility
Notclassified
Properties and Applications
red light blue. Slightly soluble in chloroform (heat), o-chlorophenol,Quinoline, insoluble in acetic acid, acetone, ethanol, pyridine, toluene, xylene. The strong sulfuric acid for brown, after diluted blue precipitation; In alkaline insurance powder solution for blue, acidic solutions for the red light in blue. And C.I. Vat ?Blue 4, C.I. Pigment Blue 60 the same chemical structure.
Purification Methods
Crystallise indanthrene repeatedly from 1,2,4-trichlorobenzene to give a blue powder. It is soluble in alkali and conc H2SO4. [Weinstein & Merritt J Am Chem Soc 81 3759 1959, Beilstein 24 II 317, 24 III/IV 2193.]
Check Digit Verification of cas no
The CAS Registry Mumber 81-77-6 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 8 and 1 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81-77:
(4*8)+(3*1)+(2*7)+(1*7)=56
56 % 10 = 6
So 81-77-6 is a valid CAS Registry Number.
InChI:InChI=1/C28H14N2O4/c31-25-13-5-1-3-7-15(13)27(33)21-17(25)9-11-19-23(21)29-20-12-10-18-22(24(20)30-19)28(34)16-8-4-2-6-14(16)26(18)32/h1-12,29-30H
81-77-6Relevant articles and documents
Indanthrone dye revisited after sixty years
Kotwica, Kamil,Bujak, Piotr,Wamil, Damian,Materna, Mariusz,Skorka, Lukasz,Gunka, Piotr A.,Nowakowski, Robert,Golec, Barbara,Luszczynska, Beata,Zagorska, Malgorzata,Pron, Adam
, p. 11543 - 11546 (2014)
Indanthrone, an old, insoluble dye can be converted into a solution processable, self-assembling and electroluminescent organic semiconductor, namely tetraoctyloxydinaptho[2,3-a:2′,3′-h]phenazine (P-C8), in a simple one-pot process consisting of the reduction of the carbonyl group by sodium dithionite followed by the substitution with solubility inducing groups under phase transfer catalysis conditions.
Preparation of dianthraquinone-N,N'-dihydroazine and its chlorination products
-
, (2008/06/13)
A process for preparing dianthraquinone-N,N'-dihydroazine (I) STR1 and its chlorination products (Ia) STR2 where n is 1 or 2, by condensation of 1-aminoanthraquinone (II) in the presence of an alkaline condensing aid, an oxidizing agent and a cyclic urea derivative at from 80° to 150° C. and subsequent purification and/or chlorination comprises using N,N'-dimethylpropyleneurea as the urea derivative.
