Description

Sodium p-[(2,4-Diaminophenyl)Azo]Benzenesulphonate CAS NO 10190-66-6 is an azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing a range of dyes and pigments, particularly those requiring specific colorfastness and stability properties. It is primarily utilized by manufacturers in the textile, leather, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: Key starting material for the synthesis of various direct, acid, and reactive azo dyes.
• Textile Dyeing and Printing: Used in the production of dyes for coloring cotton, wool, silk, and nylon fabrics.
• Leather Coloring: Employed in the manufacture of dyes for the leather tanning and finishing industry.
• Paper and Pulp Coloring: Serves as a precursor for dyes used in specialty paper products.
• Biological Staining: Potential use as an intermediate for histological stains in laboratory settings.
• Research & Development: Used in chemical research for developing new chromophores and functional materials.

Basic Information

Product Name	Sodium p-[(2,4-Diaminophenyl)Azo]Benzenesulphonate
CAS No.	10190-66-6
Molecular Formula	C18H15N5NaO3S
Molecular Weight	404.40 g/mol
Synonyms	Sodium 4-[(2,4-diaminophenyl)diazenyl]benzenesulfonate; 4-[(2,4-Diaminophenyl)azo]benzenesulfonic acid sodium salt; Benzenesulfonic acid, 4-[(2,4-diaminophenyl)azo]-, sodium salt; C.I. 37120; Azoic Diazo Component 37; Sodium 4-(2,4-diaminophenylazo)benzenesulphonate; p-[(2,4-Diaminophenyl)azo]benzenesulfonic Acid Sodium Salt
EINECS	233-447-5

Quality Control

Our Sodium p-[(2,4-Diaminophenyl)Azo]Benzenesulphonate is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed to confirm identity, strength, and the absence of critical impurities. A Certificate of Analysis (COA) detailing specific test results is provided with every shipment to support your quality assurance processes.

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 quality and stability.

Specification

Item	Specification
Appearance	Brownish-red to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents	Meets ICH guidelines

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