Description

Sodium 5-[[4-[Bis(2-Hydroxyethyl)Amino]Phenyl]Azo]-8-(Phenylazo)Naphthalene-2-Sulphonate is a high-purity, synthetic azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart specific color properties and functional characteristics in advanced material formulations. It is primarily required by manufacturers in the textile, ink, and specialty polymer industries for producing vibrant and stable colorants.

Application

• Textile Dyeing and Printing: A key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of pigments for industrial inks, including packaging and security inks.
• Plastic and Polymer Coloring: Imparts color to engineering plastics and synthetic fibers during mass coloration processes.
• Research & Development: Serves as a critical building block in chemical research for developing new chromophores and functional dyes.
• Paper Coatings: Employed in specialty paper coatings where specific color fastness is required.
• Biological Staining: Potential use as a staining agent in histological applications due to its azo structure.

Basic Information

Product Name	Sodium 5-[[4-[Bis(2-Hydroxyethyl)Amino]Phenyl]Azo]-8-(Phenylazo)Naphthalene-2-Sulphonate
CAS No.	67923-60-8
Molecular Formula	C26H24N5NaO6S
Molecular Weight	557.55 g/mol
Synonyms	Acid Black 210; C.I. 28440; Sodium 5-[[4-[bis(2-hydroxyethyl)amino]phenyl]azo]-8-(phenylazo)naphthalene-2-sulfonate; 2,7-Naphthalenedisulfonic acid, 5-[[4-[bis(2-hydroxyethyl)amino]phenyl]azo]-8-(phenylazo)-, sodium salt (1:1); 8-(Phenylazo)-5-[[4-[bis(2-hydroxyethyl)amino]phenyl]azo]-2-naphthalenesulfonic acid sodium salt; Azo Black HE-4R; Reactive Black HE-4R (related class)
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Every lot is tested against stringent in-house specifications, which typically include identity confirmation by FT-IR, purity assay by HPLC, and control of key impurities. A comprehensive Certificate of Analysis (COA) detailing all test results 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 each use to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Complete, clear solution

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