Description

2,7-Naphthalenedisulfonic Acid, 4-Amino-5-Hydroxy-, Diazotized, Coupled With Diazotized 4-Nitro-1,3-Benzenediamine And Resorcinol, Potassium Sodium Salts is a complex, high-value azo dye intermediate synthesized through a multi-step diazotization and coupling process. This compound matters for its role in producing specialized, high-performance dyes and pigments with excellent color fastness and specific optical properties. It is primarily needed by manufacturers in the textile, leather, ink, and specialty chemical industries seeking to create vivid and durable colorants.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a critical building block in the synthesis of complex, polyazo dyes, particularly for dark shades like blacks, navies, and browns.
• Textile Dyeing: Used in the production of dyes for coloring natural and synthetic fibers, including cotton, wool, and nylon, where high wash and light fastness are required.
• Leather Finishing: Employed in the formulation of dyes for leather goods, providing deep, penetrating colors with good rub fastness.
• Ink Manufacturing: A key component in the creation of high-quality printing inks, especially for packaging and publications, contributing to color strength and stability.
• Specialty Chemical Synthesis: Acts as a precursor for other functional chemicals, including optical brighteners or complexing agents, in advanced material science.
• Research & Development: Utilized in chemical R&D laboratories for developing new dye structures and studying azo coupling reactions.

Basic Information

Product Name	2,7-Naphthalenedisulfonic Acid, 4-Amino-5-Hydroxy-, Diazotized, Coupled With Diazotized 4-Nitro-1,3-Benzenediamine And Resorcinol, Potassium Sodium Salts
CAS No.	90432-08-9
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Acid Black 234; C.I. 31795; Acid Black 234; Azo Dye Intermediate (based on CAS 90432-08-9); 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid, diazotized, coupled with diazotized 4-nitro-1,3-benzenediamine and resorcinol, potassium sodium salts; Potassium sodium salt of the azo dye from diazotized 4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid, diazotized 4-nitro-1,3-benzenediamine, and resorcinol
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and performance in downstream synthesis. Quality is verified through comprehensive analytical testing, including HPLC for purity and impurity profiling, spectrophotometry for color strength, and titration for active component assay. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications.

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). This material is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 90%
Moisture Content	Max. 5.0%
Ash Content	Contact for details
Solubility (in water)	Contact for details

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