Description

4-[(4-Amino-3-Methoxyphenyl)Azo]Benzenesulfonic Acid Sodium Salt is a high-purity azo dye intermediate and specialty chemical compound, identified by CAS NO 71850-82-3. This product is valued for its precise chemical structure, which serves as a critical building block for synthesizing vibrant and stable colorants. It is primarily required by manufacturers in the dye and pigment industries, as well as by research institutions developing advanced functional materials.

Application

• Primary intermediate for the synthesis of acid dyes and direct dyes.
• Key precursor in the production of pigments for inks, textiles, and coatings.
• Used in the manufacture of colorants for specialty papers and leather.
• Research and development of novel azo compounds for analytical chemistry applications.
• Potential use in the formulation of light-sensitive materials and imaging agents.
• Starting material for high-value, custom-synthesized dyes with specific fastness properties.

Basic Information

Product Name	4-[(4-Amino-3-Methoxyphenyl)Azo]Benzenesulfonic Acid Sodium Salt
CAS No.	71850-82-3
Molecular Formula	C14H13N3O4SNa
Molecular Weight	342.32 g/mol
Synonyms	Benzenesulfonic acid, 4-[(4-amino-3-methoxyphenyl)azo]-, sodium salt; Sodium 4-[(4-amino-3-methoxyphenyl)azo]benzenesulfonate; Acid Orange 61 (C.I. 18965); C.I. Acid Orange 61; 4-[(4-Amino-3-methoxyphenyl)diazenyl]benzenesulfonic acid sodium salt; 3-Methoxy-4-aminoazobenzene-4'-sulfonic acid sodium salt; Azo dye intermediate 71850-82-3
EINECS	Contact for details

Quality Control

Our 4-[(4-Amino-3-Methoxyphenyl)Azo]Benzenesulfonic Acid Sodium Salt is manufactured under a strict 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. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance protocols.

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 after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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