dye|World dye variety

Name:C.I.Vat Blue 1,C.I.73000

Molecular Structure: Indigo class

C.I.Vat Blue 1,C.I.73000,CAS 482-89-3,262.26,C16H10N2O2,Indigo,Vat Indigo,Vat Navy Blue BG,Indigo Paste

Molecular Formula:C₁₆H₁₀N₂O₂

Molecular Weight: 262.26

CAS Registry Number:482-89-3

Manufacturing Methods : commonly known as Indigo. (A) of potassium hydroxide , sodium hydroxide, presence of a mixture of sodium cyanide, N- phenyl glycine and sodium amide (or sodium and ammonia flow ) melting transition indoxyl is false , then oxidized with air indolenine phenol ; (b) the alkali-soluble so that 2-(Carboxymethylamino)benzoic acid into 3-hydroxy-2-indole acid, and then using air oxidation in alkaline solution ; (C) with a cyanide potassium and lead carbonate in aqueous – alcoholic solution treatment  1,3-Diphenylthiourea, then by the action of ammonium sulfide generated by changes in α- cyano -N, N’- diphenyl formamidine 2 – anilino -α – ( benzylidene amino) thioacetamide , and then with hot concentrated sulfuric acid , converted to 2-Phenylimino-3-indolinone ((E) -2 – (3-oxobenzo [b] thiophen-2 (3H) – ylidene) benzo [b] thiophen-3 (2H)-one aniline ) , isolated as the hydrochloride ( or bisulfite compound) , and finally with vulcanized directly into Indigo. 2 – thio- isatin the reaction intermediate product is not isolated (Sandmeyer method ) ; This method is mainly on the preparation of (E) -2 – (3-oxobenzo [b] thiophen-2 (3H) – ylidene) benzo [b] thiophen-3 (2H)-one aniline is important, it can be used in boiling 25% sulfuric acid solution is hydrolyzed (2-Phenylimino-3-indolinone) and obtained (E) -2 – (3-oxobenzo [b] thiophen-2 (3H) – ylidene) benzo [b] thiophen-3 (2H)-one aniline (GP 119280); (d)In the presence of sodium hydroxide, 2-Nitrobenzaldehyde reacted with acetone; (e) of sodium hydroxide (o-Nitrophenylpropiolic acid) of the thermal transition of (E) -2 -(3-oxobenzo [b] thiophen-2 (3H) – ylidene) benzo [b] thiophen-3 (2H)-one aniline, then use the glucose reduction .

Properties and Applications:  Navy blue to red navy. Blue powder. Soluble in hot aniline, insoluble in ethanol. The concentrated sulfuric acid for the yellow green, diluted with blue precipitate; in concentrated nitric acid to form isatin, a red yellow. Alkaline reduction leuco pale yellow; acid is a colorless leuco restored. Mainly used for dyeing cotton yarn and cotton cloth. Can also be used for wool and silk carpets and handicrafts in the application. Pure product is used in food dyes, can also be processed into organic pigments. C.I. Pigment Blue 66 and the same chemical structure.

List of Suppliers:

Indigo,Vat Indigo,Vat Navy Blue BG

Zhejiang Runtu Co., Ltd. 

Avat Indigo Blue ( Aashiana Dyestuffs Inc )

Convat Blue A (Concord Commerce Company)

Dark Blue DB ( Coral )

Indigo (Sinochem Ningbo Imp & Exp Corp)

Indigo (Sinochem Shanghai I/E Corp/Schecho PuDong Corporation)

Indigo (Sinochem Jiangsu I/E Corp.)

Indigo (Brighten Colorchem BV)

Indigo (Sinochem Liaoning Import & Export Corporation)

Indigo 20% Pst.( Passaic Color & Chemical Co. )

Indigo Bann ( Bann Quimica Ltda )

Indigo 4B 100%( Standard Dyes )

Indigo Blue(Hangzhou Dikai Chemical Co Ltd)

Indigo Blue( Global Colors Inc. )

Indigo Powder(Chemische Fabriek Triade BV)

Indigo Pure (Sinochem Tianjin Imp Exp Corp)

Indigo Pure (Sinochem Hebei Imp & Exp Corp)

Indigo Pure(Sinochem Jiangsu Wuxi Imp & Exp Corp)

Indigo Pure Blue Powder 94%(Fenchem Enterprises Ltd)

Indigo S(Sinochem Tianjin Imp Exp Corp)

Indonon Indigo Blue ( Indokem Ltd )

Mitsui Indigo Paste( Mitsui Toatsu Chemicals Ltd )

Mitsui Indigo Pure ( Mitsui Toatsu Chemicals Ltd )

NACCO Indigo 20% Pst.( Buffalo Color Corp. )

NACC0 Indigo Pdr.( Buffalo Color Corp. )

Patco Indigo ( BF Goodrich Specialty Chemicals )

Permavat Indigo NS Gran ( Standard Dyes )

Roycevat Indigo Pst. ( Passaic Color & Chemical Co. )

Vat Blue Indigo (Nanjing Chemicals Import and Export Corp)

Vat Dark Blue VB (Sinochem Jiangsu Wuxi Imp & Exp Corp)