Description

3-[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Azo]-6-[[4-[(2,4-Diaminophenyl)Azo]-6-Sulpho-1-Naphthyl]Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid, Sodium Salt is a high-purity, polyazo dye intermediate of significant industrial importance. Its complex molecular structure provides excellent chromophoric properties, making it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce deep, vibrant, and stable colors.

Application

• Primary Intermediate for Textile Dyes: Used in the synthesis of high-grade direct, acid, and reactive dyes for cotton, wool, silk, and nylon.
• Pigment Manufacturing: Serves as a key building block for producing organic pigments used in inks, paints, and plastics.
• Specialty Ink Production: Employed in formulating inks for high-resolution printing, packaging, and security applications.
• Leather and Paper Dyeing: Acts as an intermediate for dyes applied in the coloration of leather goods and specialty papers.
• Research & Development: Utilized in chemical research for developing novel chromophores and studying azo dye chemistry.
• Analytical Chemistry: Can be used as a staining agent or indicator in specific analytical methodologies.

Basic Information

Item	Details
Product Name	3-[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Azo]-6-[[4-[(2,4-Diaminophenyl)Azo]-6-Sulpho-1-Naphthyl]Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	83232-42-2
Molecular Formula	C40H28N10O8S2•Na2 (or related sodium salt form)
Molecular Weight	Contact for details
Synonyms	Direct Black 166 (sodium salt); C.I. 30026; Polyazo Black Dye Intermediate; 3-[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Azo]-6-[[4-[(2,4-Diaminophenyl)Azo]-6-Sulfo-1-Naphthyl]Azo]-4-Hydroxy-2-Naphthalenesulfonic Acid Disodium Salt; Azo Dye Intermediate 83232-42-2; Tetrakisazo Dye Precursor; Sodium 3-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-6-[[4-[(2,4-diaminophenyl)azo]-6-sulfo-1-naphthyl]azo]-4-hydroxy-2-naphthalenesulfonate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality management systems to ensure batch-to-batch consistency and high purity. Every lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation and spectrophotometric analysis for strength. A detailed Certificate of Analysis (COA) documenting assay, impurity profile, and physical specifications is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product performance and handling. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (KF)	≤ 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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