Description

4-[[4-[(4-Amino-1-Naphthyl)Azo]-1-Naphthyl]Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt 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 the synthesis of azo dyes and pigments used in textile coloration.
• Key component in manufacturing specialty inks, including those for security printing and high-resolution applications.
• Used in the production of colorants for plastics and polymers to achieve specific hue and lightfastness properties.
• Research and development of novel functional dyes for non-textile applications, such as in optics or electronics.
• Potential use as a staining agent or biological marker in laboratory and diagnostic applications.
• Intermediate for dyes used in the paper and leather processing industries.

Basic Information

Product Name	4-[[4-[(4-Amino-1-Naphthyl)Azo]-1-Naphthyl]Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	84100-77-6
Molecular Formula	C36H24N6O6S2•xNa
Molecular Weight	Contact for details
Synonyms	4-[[4-[(4-Amino-1-naphthyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulfonic acid sodium salt; Direct Black 38 (sodium salt); C.I. 30235; Benzamine Black E; Azo Black; Naphthalene-2,7-disulfonic acid, 4-[[4-[(4-amino-1-naphthalenyl)azo]-1-naphthalenyl]azo]-, sodium salt (1:?); 84100-77-6; Sodium 4-[[4-[(4-aminonaphthalen-1-yl)diazenyl]naphthalen-1-yl]diazenyl]naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet customer specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, impurity profile, and physical characteristics.

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 sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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