Description

Disodium 4-(Benzoylamino)-5-Hydroxynaphthalene-1,7-Disulphonate is a high-purity, water-soluble naphthalene derivative with significant commercial utility. This compound is valued for its role as a key intermediate in the synthesis of dyes, pigments, and specialty colorants. It is primarily sought by manufacturers in the dyestuff, textile, and specialty chemical industries for producing vibrant and stable colors.

Application

• Dye and Pigment Intermediate: A crucial building block for synthesizing azo dyes, acid dyes, and reactive dyes.
• Textile Colorants: Used in the manufacturing of colorants for dyeing and printing natural and synthetic fibers.
• Specialty Chemical Synthesis: Serves as an intermediate for producing light-sensitive materials and other functional chemicals.
• Research & Development: Employed in academic and industrial R&D for developing novel chromophores and functional materials.
• Analytical Reagents: Can be utilized in the formulation of specific analytical reagents and indicators.

Basic Information

Product Name	Disodium 4-(Benzoylamino)-5-Hydroxynaphthalene-1,7-Disulphonate
CAS No.	20241-55-8
Molecular Formula	C₁₇H₁₂NNa₂O₉S₂
Molecular Weight	499.38 g/mol
Synonyms	4-(Benzoylamino)-5-hydroxy-1,7-naphthalenedisulfonic acid disodium salt; 5-Hydroxy-4-(benzoylamino)-1,7-naphthalenedisulfonic acid disodium salt; Disodium 4-benzamido-5-hydroxynaphthalene-1,7-disulphonate; 1,7-Naphthalenedisulfonic acid, 4-(benzoylamino)-5-hydroxy-, disodium salt; C.I. 18050; Acid Yellow 76 intermediate
EINECS	243-648-2

Quality Control

Our Disodium 4-(Benzoylamino)-5-Hydroxynaphthalene-1,7-Disulphonate is produced under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles 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 place 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 handling properties.

Specification

Item	Specification
Appearance	Yellow to brownish-yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm

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