57131-19-8 Usage
Uses
Used in Textile Industry:
Direct Black 166 is used as a dye for cellulose fiber dyeing and printing. It is also used as a substitute for C.I. Direct Black 38.
Used in Leather Industry:
Direct Black 166 is used as a dye for leather dyeing.
Properties:
Direct Black 166 has the following properties according to the ISO standard:
Acid Resistance: Grade 3
Alkali Resistance: Grade 2-3
Light Fastness: Grade 1
Soaping Fastness: Grade 3
Water Fastness: Grade 1
These properties make Direct Black 166 a suitable choice for various applications in the textile and leather industries.
Preparation
4-Amino-N-(4-aminophenyl)benzamide double nitriding, in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?coupled, aniline diazo, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?group of neighborhood, a coupling again with Benzene-1,3-diamine coupling.
Standard
Acid Resistance
Fading
Stain
Check Digit Verification of cas no
The CAS Registry Mumber 57131-19-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,1,3 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 57131-19:
(7*5)+(6*7)+(5*1)+(4*3)+(3*1)+(2*1)+(1*9)=108
108 % 10 = 8
So 57131-19-8 is a valid CAS Registry Number.
InChI:InChI=1/C35H28N10O8S2.2Na/c36-21-8-15-27(26(37)18-21)43-40-25-13-11-22(12-14-25)39-35(47)19-6-9-24(10-7-19)42-44-32-28(54(48,49)50)16-20-17-29(55(51,52)53)33(34(46)30(20)31(32)38)45-41-23-4-2-1-3-5-23;;/h1-18,41H,36-38H2,(H,39,47)(H,48,49,50)(H,51,52,53);;/q;2*+1/p-2/b43-40+,44-42+,45-33+;;
