Description

7,7'-Iminobis[3-[[4-[(4-Amino-2-Sulfophenyl)Azo]-7-Sulfo-1-Naphthalenyl]Azo]-4-Hydroxy-2-Naphthalenesulfonic Acid]Hexasodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound serves as a critical precursor for synthesizing high-performance dyes and pigments, valued for its ability to impart strong color and excellent lightfastness. It is primarily required by manufacturers in the textile, ink, and specialty chemical sectors seeking reliable, consistent quality for their production processes.

Application

• Textile Dyeing: As a key intermediate for producing reactive and direct dyes for cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the synthesis of pigments for high-quality printing inks, including inks for packaging and security applications.
• Leather Coloring: Employed in the production of dyes for the uniform and durable coloring of leather goods.
• Paper Industry: Serves as an intermediate for dyes used in specialty paper coloring and coating applications.
• Research & Development: Utilized as a standard or building block in chemical research for developing new chromophores and functional materials.
• Industrial Pigments: A precursor for manufacturing complex inorganic colorants and high-stability organic pigments.

Basic Information

Item	Details
Product Name	7,7'-Iminobis[3-[[4-[(4-Amino-2-Sulfophenyl)Azo]-7-Sulfo-1-Naphthalenyl]Azo]-4-Hydroxy-2-Naphthalenesulfonic Acid]Hexasodium Salt
CAS No.	71033-18-6
Molecular Formula	C52H28N10O20S6Na6
Molecular Weight	Approx. 1550.0 g/mol (Contact for exact details)
Synonyms	Acid Black 210; C.I. 300310; Hexasodium 7,7'-iminobis[3-[[4-[(4-amino-2-sulfophenyl)azo]-7-sulfo-1-naphthyl]azo]-4-hydroxy-2-naphthalenesulfonate]; 7,7'-Iminobis[4-hydroxy-3-[[4-[(4-amino-2-sulfophenyl)azo]-7-sulfo-1-naphthyl]azo]-2-naphthalenesulfonic acid] hexasodium salt; Azo Dye Intermediate 71033-18-6; Black 210; C.I. Acid Black 210
EINECS	Contact for details

Quality Control

Our production of 7,7'-Iminobis[3-[[4-[(4-Amino-2-Sulfophenyl)Azo]-7-Sulfo-1-Naphthalenyl]Azo]-4-Hydroxy-2-Naphthalenesulfonic Acid]Hexasodium Salt adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing to ensure high purity, consistent chemical composition, and batch-to-batch reliability. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and solubility 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, and 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 performance and handling.

Specification

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

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