131-92-0 Usage
Description
Vat Brown 3 is an odorless brown to dark brown powder that is a type of vat dye. It is insoluble in water and ethanol but slightly soluble in xylene for bordeaux red solution. In concentrated sulfuric acid, it forms a dark wine red color, which dilutes to a red light brown with flocks. Alkaline reduction leuco body results in a red color, while acid reduction leuco produces a yellow brown color. Vat Brown 3 is a light brittle dye with poor affinity to cotton, making it less used in cotton dyeing.
Uses
Used in Textile Industry:
Vat Brown 3 is used as a dye for various applications in the textile industry. It is suitable for direct printing, resist printing, and aniline black color resist. It is also suitable for the dyeing of cotton knits, with a preference for silk printing. However, it should be noted that printing and dyeing fabric with Vat Brown 3 in sunlight exposure can lead to fiber brittle damage.
Used in Viscose and Wool Dyeing:
Vat Brown 3 is also used for dyeing viscose and wool, providing a range of color options for these materials.
Used in Organic Pigment Production:
In addition to its use in the textile industry, Vat Brown 3 can be processed into an organic pigment, expanding its applications beyond dyeing and printing.
Standard:
Vat Brown 3 meets various industry standards for different properties, including:
Ironing Fastness: ISO 5, AATCC 5
Chlorine bleach: ISO 5, AATCC 5
Light Fastness: ISO 7, AATCC 7-8
Mercerized: ISO 4-5, AATCC 4-5
Oxygen bleach: ISO 4-5, AATCC 4-5
Soaping: ISO 5, AATCC 5
Fading: Not specified
Stain: Not specified
These standards ensure the quality and performance of Vat Brown 3 in various applications, making it a reliable choice for the textile and dyeing industries.
Preparation
N-(5-chloro-9,10-dioxo-9,10-dihydroanthracen-1-yl)benzamide and N-(4-amino-9,10-dioxo-9,10-dihydroanthracen-1-yl)benzamide Condensation in the presence of copper, and then cyclized with sulfuric acid.
Air & Water Reactions
Insoluble in water.
Reactivity Profile
Vat Brown 3 is incompatible with oxidizing and reducing agents. .
Fire Hazard
Flash point data for Vat Brown 3 are not available. Vat Brown 3 is probably combustible.
Flammability and Explosibility
Notclassified
Standard
Ironing Fastness
Fading
Stain
ISO
5
AATCC
5
Check Digit Verification of cas no
The CAS Registry Mumber 131-92-0 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,3 and 1 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 131-92:
(5*1)+(4*3)+(3*1)+(2*9)+(1*2)=40
40 % 10 = 0
So 131-92-0 is a valid CAS Registry Number.
InChI:InChI=1/C42H23N3O6/c46-37-24-14-7-8-15-25(24)38(47)34-33(37)30(44-42(51)22-12-5-2-6-13-22)20-28-23-18-19-27-32(35(23)45-36(28)34)40(49)26-16-9-17-29(31(26)39(27)48)43-41(50)21-10-3-1-4-11-21/h1-20,45H,(H,43,50)(H,44,51)
131-92-0Relevant articles and documents
PREPARATION METHOD OF ORIGINAL DYE OF VAT BROWN R
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, (2012/12/13)
A preparation method of original dye of Vat Brown R comprises the following steps: a. after acylation of 1,5-diaminoanthraquinone, 1-amino-5-benzamidoanthraquinone was prepared by acidic hydrolysis; b. 1-benzamido-4-bromoanthraquinone was obtained from 1-aminoanthraquinone by acylation and bromination; c. a condensate of Vat Brown R was obtained by condensation reaction of 1-amino-5-benzamidoanthraquinone and 1-benzamido-4-bromoanthraquinone; d. the original dye of Vat Brown R was obtained from the condensate of Vat Brown R by ring closing reaction and oxidation reaction. The method omits one oxidation step, economizes significant amount of oxidizing agent, and reduces significant amount of waste water, so it is very beneficial to environment protection; and the method also exhibited the advantages of highly increasing product yield and reducing the costs of raw materials to an extent of more than 30%.
