2503-73-3 Usage
Uses
Used in Textile Industry:
Direct Blue 78 is used as a dye for cotton or viscose materials in direct dyeing and printing processes. It is also used in combination with disperse dyes for bath dyeing of polyester/cotton blended fabrics.
Used in Paper Industry:
Direct Blue 78 is used as a dye for paper, providing coloration and enhancing the appearance of the paper products.
Used in Leather Industry:
Direct Blue 78 is used as a dye in the leather industry, contributing to the coloration and aesthetic appeal of leather goods.
Used in Biological Applications:
Direct Blue 78 can be used for dyeing in biological applications, such as staining and visualization in research and diagnostic settings.
Standard:
The performance standards for Direct Blue 78 in terms of acid resistance, alkali resistance, light fastness, soaping, water, and staining are as follows:
Acid Resistance: ISO 4, AATCC 5
Alkali Resistance: ISO 4-5, AATCC 4-5
Light Fastness: ISO 4-5, AATCC 5
Soaping: ISO 2-3, AATCC 3
Water Fading: ISO 2-3, AATCC 3
Stain Fading: N/A
Stain: N/A
Preparation
2-Aminobenzene-1,4-disulfonic acid diazo, and 8-Aminonaphthalene-2-sulfonic acid first coupling, its product to diazo, and Naphthalen-1-amine second coupling, again diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid third coupling.
Flammability and Explosibility
Notclassified
Standard
Acid Resistance
Fading
Stain
ISO
4
AATCC
5
Check Digit Verification of cas no
The CAS Registry Mumber 2503-73-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,5,0 and 3 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 2503-73:
(6*2)+(5*5)+(4*0)+(3*3)+(2*7)+(1*3)=63
63 % 10 = 3
So 2503-73-3 is a valid CAS Registry Number.
InChI:InChI=1/C42H29N7O13S4.4Na/c50-42-29-13-10-26(43-25-6-2-1-3-7-25)20-24(29)21-40(66(60,61)62)41(42)49-47-35-16-15-34(30-8-4-5-9-31(30)35)44-46-37-18-17-36(32-14-11-27(22-33(32)37)63(51,52)53)45-48-38-23-28(64(54,55)56)12-19-39(38)65(57,58)59;;;;/h1-23,43,50H,(H,51,52,53)(H,54,55,56)(H,57,58,59)(H,60,61,62);;;;/q;4*+1/p-4
