Description

4-(Benzoylamino)-5-Hydroxynaphthalene-1,7-Disulphonic Acid is a specialized naphthalene-based intermediate featuring both sulphonic acid and benzoylamino functional groups. This compound matters for its role as a key precursor in the synthesis of high-value dyes, pigments, and optical brighteners, where its specific structure imparts desirable color and binding properties. It is primarily needed by manufacturers in the dyestuff, textile chemical, and specialty chemical industries for developing advanced colorants and functional materials.

Application

• Dye and Pigment Intermediate: A crucial building block for the synthesis of azo dyes, acid dyes, and other complex organic pigments.
• Optical Brightener Production: Used in the manufacture of stilbene-based optical brightening agents (OBAs) for paper, textiles, and detergents.
• Textile Chemical Synthesis: Serves as a functional intermediate for creating specialized textile auxiliaries and finishing agents.
• Research & Development: Employed in chemical R&D for exploring new chromophores and functional molecules with specific light-absorption characteristics.
• Fine Chemical Synthesis: Acts as a starting material or intermediate in multi-step syntheses for other high-value specialty chemicals.

Basic Information

Item	Detail
Product Name	4-(Benzoylamino)-5-Hydroxynaphthalene-1,7-Disulphonic Acid
CAS No.	6361-49-5
Molecular Formula	C₁₇H₁₃NO₈S₂
Molecular Weight	423.42 g/mol
Synonyms	5-Hydroxy-4-(benzoylamino)naphthalene-1,7-disulfonic acid; 1,7-Naphthalenedisulfonic acid, 4-(benzoylamino)-5-hydroxy-; 4-Benzamido-5-hydroxy-1,7-naphthalenedisulfonic acid; C.I. 18050; Benzamide, N-(5-hydroxy-1,7-disulfo-2-naphthyl)-; N-(5-Hydroxy-1,7-disulfo-2-naphthyl)benzamide
EINECS	228-876-6

Quality Control

Our 4-(Benzoylamino)-5-Hydroxynaphthalene-1,7-Disulphonic Acid is produced under a stringent quality management system. 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 area at room temperature (15-25°C). Keep away from strong acids and incompatible organic solvents. Due to its light-sensitive nature, containers should be opaque or stored in dark conditions.

Specification

Item	Specification
Appearance	Off-white to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 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.