Description

Disodium 4-Hydroxy-3-[(4-Nitrophenyl)Azo]-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate is a high-purity synthetic organic compound belonging to the azo dye class, valued for its specific chromophoric properties and chemical stability. This product is engineered to deliver consistent performance and color strength for demanding industrial applications. It is primarily utilized by manufacturers in the textile, ink, and specialty chemical sectors requiring precise and reliable colorants.

Application

• Textile Dyeing: Used as a key intermediate or colorant for dyeing synthetic and natural fibers, providing specific shades with good fastness properties.
• Ink Formulation: Serves as a pigment or dye component in the production of printing inks for packaging, textiles, and specialty papers.
• Liquid Crystal Displays (LCDs): Potential application as a dichroic dye or color filter component in display technologies.
• Analytical Chemistry: Employed as a pH indicator or a staining agent in various laboratory and diagnostic procedures.
• Specialty Coatings: Incorporated into coatings and paints where specific color properties and chemical resistance are required.
• Research & Development: Used as a building block or intermediate in organic synthesis for developing new functional dyes and materials.

Basic Information

Item	Details
Product Name	Disodium 4-Hydroxy-3-[(4-Nitrophenyl)Azo]-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate
CAS No.	6441-94-7
Molecular Formula	C29H20N4Na2O10S3
Molecular Weight	750.66 g/mol
Synonyms	Acid Orange 67; C.I. 14172; Disodium 4-hydroxy-3-[(4-nitrophenyl)azo]-5-[(4-methylphenyl)sulfonylamino]naphthalene-2,7-disulfonate; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-[(4-nitrophenyl)azo]-5-[(4-methylphenyl)sulfonyl]amino]-, disodium salt; 4-Hydroxy-3-[(4-nitrophenyl)azo]-5-[[(4-methylphenyl)sulfonyl]amino]-2,7-naphthalenedisulfonic acid disodium salt; Azo dye intermediate 6441-94-7; p-Toluenesulfonyl derivative of an azo dye.
EINECS	229-235-6

Quality Control

Our production of Disodium 4-Hydroxy-3-[(4-Nitrophenyl)Azo]-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate adheres to stringent quality control protocols to ensure batch-to-batch consistency and meets the high standards required for industrial applications. Each lot is analyzed for critical parameters including purity, color strength, and impurity profile. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory needs.

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 performance and stability.

Specification

Item	Specification
Appearance	Orange to red-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
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.