Description

4-Nitro-4'-Aminoazobenzene-2-Sulfonic Acid is a specialized azo dye intermediate and analytical reagent of significant commercial importance. This compound matters for its role as a key precursor in the synthesis of high-value, colorfast dyes and pigments, as well as its utility in biochemical research and diagnostic applications. Industries that need it include manufacturers of textile dyes, leather colorants, ink formulations, and research laboratories focused on histology and protein analysis.

Application

• Primary Intermediate for Azo Dyes: A crucial building block for synthesizing acid dyes and direct dyes used in textile, paper, and leather industries.
• Pigment Manufacturing: Used in the production of high-performance organic pigments requiring specific color properties and stability.
• Biological Staining & Histology: Employed as a staining agent or precursor in laboratory settings for microscopic analysis of tissues.
• Analytical Chemistry Reagent: Functions as a chromogenic agent or standard in various spectrophotometric and chromatographic analytical methods.
• Research & Development: Serves as a model compound or starting material in chemical research for developing new colorants and functional materials.
• Ink Formulation: Used in specialty printing inks where specific color shades and chemical resistance are required.

Basic Information

Product Name	4-Nitro-4'-Aminoazobenzene-2-Sulfonic Acid
CAS No.	208246-14-4
Molecular Formula	C₁₂H₁₀N₄O₅S
Molecular Weight	322.30 g/mol
Synonyms	4-Nitro-4'-aminoazobenzene-2-sulphonic acid; 2-Sulfo-4-nitro-4'-aminoazobenzene; 4-Amino-4'-nitroazobenzene-2'-sulfonic acid; Acid Yellow 36 intermediate; C.I. 13065; Azoic Diazo Component 37; 1-Amino-4-[(4-nitrophenyl)azo]benzene-2-sulfonic acid; 4-[(4-Nitrophenyl)azo]aniline-2-sulfonic acid
EINECS	Contact for details

Quality Control

Our 4-Nitro-4'-Aminoazobenzene-2-Sulfonic Acid is manufactured under a stringent quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye synthesis and research applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your quality standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality and performance.

Specification

Item	Specification
Appearance	Orange to brownish-red powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in alkaline aqueous solutions

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