Description

7,7'-[Carbonylbis(Imino-4,1-Phenyleneazo)]Bis(1,3-Naphthalenedisulfonic Acid Disodium) Salt is a high-purity, water-soluble disazo dye intermediate with excellent chromophoric properties. Its value lies in its role as a critical precursor for synthesizing specialized dyes and pigments, offering consistent batch-to-batch quality for demanding industrial processes. This compound is essential for manufacturers in the textile, ink, and specialty chemical sectors who require reliable intermediates for producing vibrant and stable colorants.

Application

• Textile Dye Intermediate: A key building block for the synthesis of acid dyes and direct dyes used on nylon, silk, wool, and paper.
• Inkjet Ink Formulation: Used in the production of high-performance colorants for industrial and commercial inkjet printing applications.
• Functional Dye Synthesis: Serves as a precursor for dyes used in biological staining, laser dyes, and other functional colorant applications.
• Laboratory Reagent: Employed as a standard or intermediate in chemical research and analytical method development.
• Specialty Pigment Manufacturing: Utilized in the creation of complex organic pigments for plastics and coatings.

Basic Information

Product Name	7,7'-[Carbonylbis(Imino-4,1-Phenyleneazo)]Bis(1,3-Naphthalenedisulfonic Acid Disodium) Salt
CAS No.	71598-15-7
Molecular Formula	C35H22N6Na2O13S4
Molecular Weight	908.81 g/mol
Synonyms	Acid Yellow 219; C.I. 13915; Direct Yellow 142; 7,7'-[Carbonylbis(imino-4,1-phenyleneazo)]bis[1,3-naphthalenedisulfonic acid] disodium salt; Disodium 7,7'-[carbonylbis(imino-4,1-phenyleneazo)]bis(1,3-naphthalenedisulphonate); Azo dye intermediate 71598-15-7; Bis(azo) dye intermediate
EINECS	Contact for details

Quality Control

Our production of 7,7'-[Carbonylbis(Imino-4,1-Phenyleneazo)]Bis(1,3-Naphthalenedisulfonic Acid Disodium) Salt adheres to stringent quality management protocols to ensure high purity and consistent performance. Every batch is analyzed using advanced techniques like HPLC and spectrophotometry to verify identity, strength, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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