Description

4-[(2-Amino-3-Hydroxy-4-Pyridinyl)Azo]Benzenesulfonic Acid is a specialized azo dye intermediate characterized by its distinct molecular structure containing both a pyridine ring and a sulfonic acid group. This compound is valued for its role in synthesizing high-performance, water-soluble dyes and pigments with excellent color fastness and stability. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and durable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid dyes and direct dyes for coloring nylon, silk, wool, and paper.
• Textile Industry: Used in the production of dyes that offer good wash and light fastness on protein-based and polyamide fibers.
• Ink Manufacturing: Employed in the formulation of specialty inks, including those for ink-jet printing, requiring specific solubility and color properties.
• Research & Development: Utilized in chemical research for developing new chromophores and functional dyes with tailored properties.
• Biological Staining: Potential application as a precursor for stains used in histology or microscopy due to its azo chromophore structure.

Basic Information

Product Name	4-[(2-Amino-3-Hydroxy-4-Pyridinyl)Azo]Benzenesulfonic Acid
CAS No.	65837-77-6
Molecular Formula	C11H10N4O4S
Molecular Weight	294.28 g/mol
Synonyms	Benzenesulfonic acid, 4-[(2-amino-3-hydroxy-4-pyridinyl)azo]-; 2-Amino-3-hydroxy-4-(4-sulfophenylazo)pyridine; 4-(2-Amino-3-hydroxy-4-pyridylazo)benzenesulfonic acid; Acid Yellow 2G intermediate; C.I. 18970 intermediate; AZO dye intermediate 65837-77-6; Pyridine azo benzene sulfonic acid derivative
EINECS	Contact for details

Quality Control

Our production of 4-[(2-Amino-3-Hydroxy-4-Pyridinyl)Azo]Benzenesulfonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and purity, and IR for structural confirmation. A Certificate of Analysis (COA) detailing all specifications is provided with every 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). Keep away from strong oxidizing agents and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

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
Solubility (Water)	Soluble, clear solution

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