Description

4-[[4-[(4-Hydroxy-o-Tolyl)Azo]Phenyl]Amino]-3-Nitrobenzenesulphonic Acid is a specialized azo dye intermediate, valued for its ability to impart specific color properties and functional characteristics in advanced formulations. Its molecular structure makes it a critical precursor for synthesizing high-performance dyes and pigments with excellent light and wash fastness. This compound is primarily required by manufacturers in the textile, ink, and specialty chemical industries seeking to develop vibrant and durable colorants.

Application

• Textile Dyeing: A key intermediate for the synthesis of acid dyes and reactive dyes used on wool, silk, and polyamide fibers.
• Ink Manufacturing: Used in the production of colorants for inks, including those for packaging, security, and digital printing applications.
• Pigment Production: Serves as a precursor for manufacturing high-performance organic pigments used in plastics, coatings, and masterbatches.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo dye chemistry and photostability.
• Specialty Chemicals: Utilized in the synthesis of functional dyes for non-textile applications, such as in optical filters or light-absorbing materials.

Basic Information

Product Name	4-[[4-[(4-Hydroxy-o-Tolyl)Azo]Phenyl]Amino]-3-Nitrobenzenesulphonic Acid
CAS No.	38455-53-7
Molecular Formula	C19H16N4O6S
Molecular Weight	428.42 g/mol
Synonyms	Benzenesulfonic acid, 4-[[4-[(4-hydroxy-2-methylphenyl)azo]phenyl]amino]-3-nitro-; 3-Nitro-4-[[4-[(4-hydroxy-2-methylphenyl)azo]phenyl]amino]benzenesulfonic acid; 4-[(4-[(4-Hydroxy-2-methylphenyl)azo]phenyl)amino]-3-nitrobenzenesulfonic acid; C.I. 18050; Azo dye intermediate 38455-53-7; 4-Amino-3-nitrobenzenesulfonic acid azo derivative
EINECS	Contact for details

Quality Control

Our 4-[[4-[(4-Hydroxy-o-Tolyl)Azo]Phenyl]Amino]-3-Nitrobenzenesulphonic Acid is produced under a strict quality management system. 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 it meets 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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

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
Water Solubility	Partially soluble

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