Description

Disodium 5-((4-((4-Chloro-3-Sulfonatophenyl)Azo)-1-Naphthyl)Azo)-8-(Phenylamino)-1-Naphthalenesulfonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart strong, stable coloration and is a critical precursor in the synthesis of specialized dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of complex, high-molecular-weight azo dyes for textiles and leather.
• Specialty Ink Production: Used in the formulation of inks for packaging, security printing, and digital applications requiring specific color fastness.
• Pigment Manufacturing: Serves as a precursor for the creation of organic pigments used in plastics, paints, and coatings.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying dye-sensitized systems.
• Analytical Chemistry: Can be utilized as a colorimetric reagent or a standard in analytical methods due to its defined structure.

Basic Information

Product Name	Disodium 5-((4-((4-Chloro-3-Sulfonatophenyl)Azo)-1-Naphthyl)Azo)-8-(Phenylamino)-1-Naphthalenesulfonate
CAS No.	6527-62-4
Molecular Formula	C32H20ClN5Na2O6S2
Molecular Weight	724.10 g/mol
Synonyms	Direct Black 19 (disodium salt); C.I. 35255; Disodium 5-[(E)-[4-[(E)-(4-chloro-3-sulfonatophenyl)diazenyl]naphthalen-1-yl]diazenyl]-8-anilino-1-naphthalenesulfonate; 5-((4-((4-Chloro-3-sulfonatophenyl)azo)-1-naphthyl)azo)-8-(phenylamino)-1-naphthalenesulfonic acid disodium salt; Azo Black; Acid Black 19 (disodium salt); Direct Black 19, Sodium Salt
EINECS	229-419-2

Quality Control

Our production of this azo dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and strength. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to support your quality assurance processes.

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). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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