Description

2,4-Dihydroxy-3,5-Bis[(4-Nitrophenyl)Azo]Benzenesulfonic Acid is a specialized azo dye intermediate characterized by its distinct sulfonic acid and nitro-substituted aromatic structure. This compound matters for its role as a key precursor in the synthesis of high-performance dyes and pigments, offering excellent color fastness and thermal stability. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries for producing vivid, durable colors.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a crucial building block for synthesizing complex, high-value azo colorants used in textiles and plastics.
• Textile Dyeing: Used in the production of dyes for coloring natural and synthetic fibers, valued for good wash and light fastness.
• Ink Formulation: Employed in the manufacture of industrial and printing inks, contributing to color intensity and stability.
• Specialty Chemical Synthesis: Acts as an intermediate for creating functional chemicals used in research and advanced material development.
• Analytical Reagent: Can be utilized as a chromogenic agent or standard in specific analytical chemistry applications.

Basic Information

Product Name	2,4-Dihydroxy-3,5-Bis[(4-Nitrophenyl)Azo]Benzenesulfonic Acid
CAS No.	27831-63-6
Molecular Formula	C24H16N6O9S
Molecular Weight	564.48 g/mol
Synonyms	Benzenesulfonic acid, 2,4-dihydroxy-3,5-bis[(4-nitrophenyl)azo]-; 3,5-Bis(p-nitrophenylazo)-2,4-dihydroxybenzenesulfonic acid; 2,4-Dihydroxy-3,5-bis(4-nitrophenylazo)benzenesulfonic acid; Acid Orange 74 (C.I. 18745); C.I. Acid Orange 74; Azo dye intermediate 27831-63-6; 3,5-Di(4-nitrophenylazo)-2,4-dihydroxybenzenesulfonic acid
EINECS	Contact for details

Quality Control

Our 2,4-Dihydroxy-3,5-Bis[(4-Nitrophenyl)Azo]Benzenesulfonic Acid is produced under stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical identity. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment to guarantee compliance with your technical requirements.

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 sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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