Description

2-Hydroxy-5-[[4-[(4-Nitro-2-Sulfophenyl)Amino]Phenyl]Azo]Benzoic Acid is a high-purity azo dye intermediate and analytical reagent. This compound is valued for its precise chemical structure, which is critical for producing consistent colorants and functioning as a specialized reagent in laboratory settings. It is primarily required by manufacturers in the dye and pigment industry, as well as by research and quality control laboratories for analytical applications.

Application

• Key intermediate in the synthesis of acid dyes and pigments for textiles, leather, and paper.
• Specialized reagent for analytical chemistry and biochemical research applications.
• Used in the development of colorimetric sensors and indicators.
• Potential component in the formulation of inks and specialty coatings.
• Employed in laboratory settings for teaching and method development in organic synthesis.

Basic Information

Product Name	2-Hydroxy-5-[[4-[(4-Nitro-2-Sulfophenyl)Amino]Phenyl]Azo]Benzoic Acid
CAS No.	21268-97-3
Molecular Formula	C19H14N4O7S
Molecular Weight	442.40 g/mol
Synonyms	Benzoic acid, 2-hydroxy-5-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]-; C.I. 15865; Acid Orange 61; 4-[(4-[(4-Nitro-2-sulfophenyl)amino]phenyl)azo]salicylic acid; 5-[(4-[(4-Nitro-2-sulfophenyl)amino]phenyl)azo]salicylic acid; 2-Hydroxy-5-[(4-[(4-nitro-2-sulfophenyl)amino]phenyl)azo]benzoic acid; 21268-97-3
EINECS	Contact for details

Quality Control

Our 2-Hydroxy-5-[[4-[(4-Nitro-2-Sulfophenyl)Amino]Phenyl]Azo]Benzoic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing specific batch results are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic nature, protect from moisture.

Specification

Item	Specification
Appearance	Orange to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Residue on Ignition	≤ 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.