5,7-dichloro-1,2-dihydro-2-(1-oxonaphtho[2,1-b]thien-2(1H)-ylidene)-3H-indol-3-one is a brown powder with high substantivity to cellulose fibers and good levelness. It exhibits color changes in acidic and alkaline conditions, turning red light brown in concentrated sulfuric acid and yellow orange in alkaline reduction leuco, while acid reduction leuco results in a yellow color.
6424-67-5
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Basic information
- Product Name: 5,7-dichloro-1,2-dihydro-2-(1-oxonaphtho[2,1-b]thien-2(1H)-ylidene)-3H-indol-3-one
- Synonyms: 5,7-dichloro-1,2-dihydro-2-(1-oxonaphtho[2,1-b]thien-2(1H)-ylidene)-3H-indol-3-one;Vat brown 42 (C.I. 73665)
- CAS NO:6424-67-5
- Molecular Formula: C20H9Cl2NO2S
- Molecular Weight: 398.26196
- EINECS: 229-184-2
- Product Categories: N/A
- Mol File: 6424-67-5.mol
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Chemical Properties
- Melting Point: N/A
- Boiling Point: 549.9°C at 760 mmHg
- Flash Point: 286.4°C
- Appearance: /
- Density: 1.615g/cm3
- Vapor Pressure: 3.84E-12mmHg at 25°C
- Refractive Index: 1.792
- Storage Temp.: N/A
- Solubility: N/A
- CAS DataBase Reference: 5,7-dichloro-1,2-dihydro-2-(1-oxonaphtho[2,1-b]thien-2(1H)-ylidene)-3H-indol-3-one(CAS DataBase Reference)
- NIST Chemistry Reference: 5,7-dichloro-1,2-dihydro-2-(1-oxonaphtho[2,1-b]thien-2(1H)-ylidene)-3H-indol-3-one(6424-67-5)
- EPA Substance Registry System: 5,7-dichloro-1,2-dihydro-2-(1-oxonaphtho[2,1-b]thien-2(1H)-ylidene)-3H-indol-3-one(6424-67-5)
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Safety Data
- Hazard Codes: N/A
- Statements: N/A
- Safety Statements: N/A
- WGK Germany:
- RTECS:
- HazardClass: N/A
- PackingGroup: N/A
- Hazardous Substances Data: 6424-67-5(Hazardous Substances Data)
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6424-67-5 Usage
Uses
Used in Textile Industry:5,7-dichloro-1,2-dihydro-2-(1-oxonaphtho[2,1-b]thien-2(1H)-ylidene)-3H-indol-3-one is used as a direct dye for cotton fabric dyeing, providing excellent ironing fastness, chlorine bleach resistance, light fastness, and oxygen bleach resistance. It is also suitable for silk and wool dyeing.
Standard:
The standard for 5,7-dichloro-1,2-dihydro-2-(1-oxonaphtho[2,1-b]thien-2(1H)-ylidene)-3H-indol-3-one includes the following ratings:
Ironing Fastness: 4
Chlorine bleach: 4-5
Light Fastness: 6
Mercerized: 4
Oxygen bleach: 5
Soaping: 5
Fading and Stain:
The fading and stain ratings for 5,7-dichloro-1,2-dihydro-2-(1-oxonaphtho[2,1-b]thien-2(1H)-ylidene)-3H-indol-3-one are as follows:
Fading: ISO 4
Stain: ISO 4-5
Preparation
Naphtho[2,1-b]thiophen-1(2H)-one with 2,2,5,7-Tetrachloro-3-indolinone?condensation.Standard
Ironing FastnessFading
StainISO
4Check Digit Verification of cas no
The CAS Registry Mumber 6424-67-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,2 and 4 respectively; the second part has 2 digits, 6 and 7 respectively.Calculate Digit Verification of CAS Registry Number 6424-67:
(6*6)+(5*4)+(4*2)+(3*4)+(2*6)+(1*7)=95
95 % 10 = 5
So 6424-67-5 is a valid CAS Registry Number.
InChI:InChI=1/C20H9Cl2NO2S/c21-10-7-12-16(13(22)8-10)23-17(18(12)24)20-19(25)15-11-4-2-1-3-9(11)5-6-14(15)26-20/h1-8,23H/b20-17-
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5,7-dichloro-1,2-dihydro-2-(1-oxonaphtho[2,1-b]thien-2(1H)-ylidene)-3H-indol-3-one
