6371-35-3

Basic information

• Product Name: 7,7'-Dibromo-5,5'-dichloro-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione
• Synonyms: 7,7'-Dibromo-5,5'-dichloro-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione;BASF Brilliant Indigo BB;Brilliant Indigo BASF/2B;C.I.73050;C.I.Vat Blue 37
• CAS NO: 6371-35-3
• Molecular Formula: C28H25NO3
• Molecular Weight: 423.503
• Mol File: 6371-35-3.mol
• Article Data: 0

Chemical Properties

• Boiling Point: 637.8°C at 760 mmHg
• Flash Point: 339.5°C
• Appearance: /
• Density: 1.263g/cm³
• Vapor Pressure: 3.62E-16mmHg at 25°C
• Refractive Index: 1.646
• CAS DataBase Reference: 7,7'-Dibromo-5,5'-dichloro-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione(CAS DataBase Reference)
• NIST Chemistry Reference: 7,7'-Dibromo-5,5'-dichloro-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione(6371-35-3)
• EPA Substance Registry System: 7,7'-Dibromo-5,5'-dichloro-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione(6371-35-3)

Safety Data

• Hazardous Substances Data: 6371-35-3(Hazardous Substances Data)

Usage

Description

7,7'-Dibromo-5,5'-dichloro-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione is a halogenated organic compound with a unique structure that exhibits distinct color changes in various chemical environments. It is characterized by its blue color, which can change to light green in concentrated sulfuric acid, blue flocks upon dilution, yellow brown in basic insurance powder solution, and colorless in acidic insurance powder solution.

Uses

Used in Textile Industry:
7,7'-Dibromo-5,5'-dichloro-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione is used as a dye and colorant for textiles, providing a range of color variations depending on the chemical environment. Its unique color-changing properties make it suitable for creating visually appealing and distinctive textile designs.
Used in Analytical Chemistry:
7,7'-Dibromo-5,5'-dichloro-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione can be used as an indicator in analytical chemistry due to its color-changing properties in different chemical environments. This allows for the detection and analysis of various chemical substances and conditions.
Used in Quality Control:
7,7'-Dibromo-5,5'-dichloro-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione can be employed in quality control processes to test the performance of various materials, such as textiles, under different conditions. Its color changes can be used to evaluate factors like ironing fastness, chlorine bleach, light fastness, mercerized, oxygen bleach, and soaping.
Standard:
The standard for 7,7'-Dibromo-5,5'-dichloro-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione is as follows:
Ironing Fastness: ISO 5
Chlorine bleach: 2
Light Fastness: 4
Mercerized: 2-3
Oxygen bleach: 3

Preparation

(a) 5,5′-Dichlomindigotin?(GP 224204224 810); (b) 7,7′-Dibromoindigo chlorinated (GP 237262)

Standard

Ironing Fastness

Fading

Stain

ISO

5

InChI:InChI=1/C28H25NO3/c1-4-32-18-15-13-17(14-16-18)29-25(30)23-24(26(29)31)28(3)21-11-7-5-9-19(21)27(23,2)20-10-6-8-12-22(20)28/h5-16,23-24H,4H2,1-3H3