Description

Benzenesulfonic Acid, 2-Amino-5-Nitro-, Diazotized, Coupled With Diazotized 3-Amino-4-Methoxybenzenesulfonic Acid And Resorcinol, Sodium Salts is a complex, high-purity azo dye intermediate synthesized via a multi-step diazotization and coupling process. This compound matters for its role as a critical precursor in the production of specialized, high-value dyes and pigments, offering precise color characteristics and structural integrity. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries seeking to develop vibrant and stable colorants for demanding applications.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of high-performance, complex azo dyes used in textile dyeing and printing.
• Specialty Ink Formulations: Used in the production of colorants for inks requiring specific shades, stability, and compatibility, such as those for packaging or security printing.
• Functional Dye Synthesis: A precursor for dyes with specialized properties, including light-fastness or specific substrate affinity for technical textiles.
• Research & Development: Employed in chemical R&D labs for developing novel chromophores and studying azo coupling reactions.
• Industrial Colorant Production: Integral to manufacturing batches of standardized colorants for plastics, coatings, or other polymer applications.

Basic Information

Product Name	Benzenesulfonic Acid, 2-Amino-5-Nitro-, Diazotized, Coupled With Diazotized 3-Amino-4-Methoxybenzenesulfonic Acid And Resorcinol, Sodium Salts
CAS No.	90218-25-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Azoic Coupling Component; Diazotized 2-Amino-5-Nitrobenzenesulfonic Acid coupled with Diazotized 3-Amino-4-Methoxybenzenesulfonic Acid and Resorcinol Sodium Salt; Azo Dye Intermediate 90218-25-0; Sodium 2-[(2-amino-5-nitrophenyl)diazenyl]-5-hydroxy-4-[(3-methoxy-4-sulfonatophenyl)diazenyl]benzenesulfonate; Resorcinol, coupled with diazotized 2-amino-5-nitrobenzenesulfonic acid and diazotized 3-amino-4-methoxybenzenesulfonic acid, sodium salts; Complex Azo Coupling Product; Disazo dye intermediate.
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Every batch is controlled against stringent in-house specifications for identity, purity, and composition to guarantee batch-to-batch consistency essential for dye synthesis. Certificates of Analysis (COA) detailing key parameters are available upon request.

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 to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Brown to dark brown powder or solid
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
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.