4735-07-3

Usage

Uses

Used in Textile Industry:
9-Chloro-2-[3-(sodiosulfooxy)benzo[b]thiophen-2-yl]naphtho[2,3-b]thiophen-3-ol (sulfuric acid sodium) salt is used as a dye or pigment for coloring textiles. Its unique color and properties contribute to the production of vibrant and long-lasting textiles.
Used in Mercerized Textiles:
In the mercerization process, this compound is used to enhance the luster, strength, and affinity of the textile fibers for dyes. This results in improved fabric quality and appearance.
Used in Textile Finishing Processes:
9-Chloro-2-[3-(sodiosulfooxy)benzo[b]thiophen-2-yl]naphtho[2,3-b]thiophen-3-ol (sulfuric acid sodium) salt is used in various textile finishing processes, such as ironing fastness, chlorine bleach, light fastness, oxygen bleach, and soaping. Its properties contribute to the durability, colorfastness, and overall performance of the finished textiles.
ISO Standards:
9-Chloro-2-[3-(sodiosulfooxy)benzo[b]thiophen-2-yl]naphtho[2,3-b]thiophen-3-ol (sulfuric acid sodium) salt adheres to ISO standards, with ratings of 4-5 for ironing fastness, chlorine bleach, and oxygen bleach, and a rating of 4 for light fastness and soaping. This ensures that textiles treated with this compound meet industry quality and performance standards.

Preparation

(a) in the presence of Pyridine , with Chlorosulfonic acid treatment C.I. Vat Violet 4 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 4. The above two kinds of situation after alkaline, filter out insolubles, remove Pyridine and salting out.

Standard

Ironing Fastness

Fading

Stain

ISO

4-5