Description

3-[(4-Amino-2-Methoxyphenyl)Azo]-4-Hydroxybenzenesulphonic Acid is a specialized azo dye intermediate characterized by its distinct aromatic structure containing amino, methoxy, and sulphonic acid functional groups. This compound is valued for its role in synthesizing high-performance dyes and pigments, offering excellent color properties and stability. It is primarily utilized by manufacturers in the dye and pigment, textile, and specialty chemical industries seeking to produce vibrant and durable colorants.

Application

• Primary intermediate for the synthesis of azo dyes and pigments, particularly for textile applications.
• Used in the production of specialty colorants for inks, coatings, and plastics.
• Acts as a key precursor in the manufacture of hair dyes and other cosmetic color additives.
• Employed in research and development for novel functional dyes with specific optical or chemical properties.
• Potential use as a biochemical stain or indicator in laboratory settings.
• Intermediate for dyes used in leather and paper coloring processes.

Basic Information

Product Name	3-[(4-Amino-2-Methoxyphenyl)Azo]-4-Hydroxybenzenesulphonic Acid
CAS No.	85895-92-7
Molecular Formula	C13H12N4O5S
Molecular Weight	336.32 g/mol
Synonyms	4-Hydroxy-3-[(4-amino-2-methoxyphenyl)azo]benzenesulfonic acid; 3-[(4-Amino-2-methoxyphenyl)azo]-4-hydroxybenzenesulfonic acid; Benzenesulfonic acid, 3-[(4-amino-2-methoxyphenyl)azo]-4-hydroxy-; C.I. 37155; Acid Orange 156; Azo dye intermediate OA-156
EINECS	Contact for details

Quality Control

Our production of 3-[(4-Amino-2-Methoxyphenyl)Azo]-4-Hydroxybenzenesulphonic Acid adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. A detailed Certificate of Analysis (COA) is provided with every shipment to guarantee traceability and consistent quality.

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 acids and organic solvents. The container should be kept tightly sealed to protect from moisture and contamination.

Specification

Item	Specification
Appearance	Brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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