Description

Tetrasodium 7-[(1,8-Dihydroxy-3,6-Disulphonato-2-Naphthyl)Azo]Naphthalene-1,3-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its value lies in its role as a key precursor for synthesizing high-performance dyes and pigments, particularly those requiring excellent water solubility and complexing properties. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vibrant, stable colorants.

Application

• Primary Intermediate for Dye Synthesis: Serves as a crucial building block for manufacturing acid dyes, direct dyes, and reactive dyes used in textile coloring.
• Textile Industry: Used in the production of dyes for wool, silk, nylon, and paper, offering good lightfastness and washfastness.
• Ink Manufacturing: Acts as a key component in formulating specialty inks, including those for inkjet and packaging applications.
• Biological Staining: Potential use as an intermediate for histological stains and indicators in laboratory settings.
• Metal Complex Dyes: Functions as a ligand for creating metallized dyes, which provide enhanced color stability and properties.
• Research & Development: Employed in chemical R&D for synthesizing novel chromophores and functional dyes.

Basic Information

Product Name	Tetrasodium 7-[(1,8-Dihydroxy-3,6-Disulphonato-2-Naphthyl)Azo]Naphthalene-1,3-Disulphonate
CAS No.	29637-28-3
Molecular Formula	C₂₀H₈N₂Na₄O₁₄S₄
Molecular Weight	760.48 g/mol
Synonyms	Acid Black 1, Tetrasodium Salt; Naphthalene Black 12B; C.I. 20470; 7-[(1,8-Dihydroxy-3,6-disulfo-2-naphthyl)azo]-1,3-naphthalenedisulfonic acid tetrasodium salt; Azo Black T; Amido Naphthol Black B; Tetrasodium 1-amino-2-phenol-4-sulfonate-8-azo-2'-naphthol-3,6-disulfonate (variants).
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 7-[(1,8-Dihydroxy-3,6-Disulphonato-2-Naphthyl)Azo]Naphthalene-1,3-Disulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content	Max. 5.0%
Sulfated Ash	Contact for details
Solubility (in Water)	Freely soluble

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