Description

Benzenesulfonic Acid, 2,2'-(1,2-Ethenediyl)Bis[5-Nitro-, Reaction Products With 3-[(4-Amino-5-Methoxy-2-Methylphenyl)Azo]Benzenesulfonic Acid Monosodium Salt is a complex, high-purity azo dye intermediate and specialty chemical. This compound is engineered to deliver consistent performance and color strength in demanding industrial applications. It is a critical raw material for manufacturers in the textile, ink, and specialty coatings industries requiring precise and stable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of high-performance, complex azo dyes for textiles and fibers.
• Textile Dyeing and Printing: Used in the formulation of dyes for cotton, wool, silk, and synthetic fabrics, offering good light and wash fastness.
• Ink Manufacturing: Employed in the production of pigments for specialty printing inks, including packaging and security inks.
• Specialty Coatings and Paints: Acts as a colorant component in industrial coatings where specific color properties are required.
• Research & Development: Utilized in chemical research for developing new chromophores and studying dye chemistry.
• Paper Coloring: Potential application in the manufacture of colored papers and paper products.

Basic Information

Item	Detail
Product Name	Benzenesulfonic Acid, 2,2'-(1,2-Ethenediyl)Bis[5-Nitro-, Reaction Products With 3-[(4-Amino-5-Methoxy-2-Methylphenyl)Azo]Benzenesulfonic Acid Monosodium Salt
CAS No.	1325-61-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Direct Black 19 (principal component); C.I. 35255; Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-nitro-, reaction products with 3-[(4-amino-5-methoxy-2-methylphenyl)azo]benzenesulfonic acid, monosodium salt; Azo Black; Sodium Salt of Azo Dye Intermediate; 3-[(4-Amino-5-methoxy-2-methylphenyl)azo]benzenesulfonic acid monosodium salt, reaction products with 2,2'-(1,2-ethenediyl)bis[5-nitrobenzenesulfonic acid]; C.I. Direct Black 19
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency, purity, and performance. Quality is verified through advanced analytical techniques including HPLC, spectrophotometry, and titration. A comprehensive Certificate of Analysis (COA) detailing identity, assay, impurity profile, and physical specifications is provided with every shipment to guarantee it meets your specific application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	Min. 95% (as principal component)
Moisture Content	Max. 5.0%
Ash Content	Max. 2.0%
Solubility	Soluble in water; sparingly soluble in organic solvents

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.