3875-71-6

Usage

Uses

Used in Textile Industry:
5,7-Dichloro-2-[5,6,7-trichloro-3-(sodiosulfooxy)benzo[b]thiophen-2-yl]-1H-indol-3-ol (sulfuric acid sodium) salt is used as a dye for textiles. Its unique color and solubility properties make it suitable for coloring fabrics, providing a vibrant and long-lasting hue.
Used in Stain Resistance:
5,7-Dichloro-2-[5,6,7-trichloro-3-(sodiosulfooxy)benzo[b]thiophen-2-yl]-1H-indol-3-ol (sulfuric acid sodium) salt is also used to enhance the stain resistance of textiles. Its chemical structure allows it to form strong bonds with fabric fibers, making it difficult for stains to penetrate and adhere to the material.
Used in Mercerized Fabrics:
5,7-Dichloro-2-[5,6,7-trichloro-3-(sodiosulfooxy)benzo[b]thiophen-2-yl]-1H-indol-3-ol (sulfuric acid sodium) salt is used in the treatment of mercerized fabrics. Mercerization is a process that increases the luster and strength of cotton fabrics, and 5,7-Dichloro-2-[5,6,7-trichloro-3-(sodiosulfooxy)benzo[b]thiophen-2-yl]-1H-indol-3-ol (sulfuric acid sodium) salt can enhance these properties further.
Used in Various Bleaching Processes:
5,7-Dichloro-2-[5,6,7-trichloro-3-(sodiosulfooxy)benzo[b]thiophen-2-yl]-1H-indol-3-ol (sulfuric acid sodium) salt is compatible with various bleaching processes, such as chlorine bleach and oxygen bleach. It maintains its color and properties even after exposure to these harsh chemicals, making it suitable for use in industrial settings.
Used in ISO Standards:
5,7-Dichloro-2-[5,6,7-trichloro-3-(sodiosulfooxy)benzo[b]thiophen-2-yl]-1H-indol-3-ol (sulfuric acid sodium) salt meets the ISO standards for various properties, such as ironing fastness, light fastness, and soaping. This ensures that textiles treated with 5,7-Dichloro-2-[5,6,7-trichloro-3-(sodiosulfooxy)benzo[b]thiophen-2-yl]-1H-indol-3-ol (sulfuric acid sodium) salt maintain their quality and performance over time.

Preparation

(a) in the presence of Pyridine , with Chlorosulfonic acid treatment ?C.I. Vat Violet 5 leuco; (b) in the Pyridine with metal (such as copper, iron, zinc, etc) and Sulfur trioxide source (such as Sulfur trioxide, Chlorosulfonic acid or Methyl chlorosulfonate, etc.) processing ?C.I. Vat Violet 5. The above two kinds of situation after alkaline, filter out insolubles, remove Pyridine and salting out.

Standard

Ironing Fastness

Fading

Stain

ISO

3-4