Description

4-[(2,4-Dichlorobenzoyl)Amino]-5-Hydroxynaphthalene-1,7-Disulphonic Acid is a specialized naphthalene-based intermediate featuring a dichlorobenzoyl amide linkage and dual sulphonic acid groups. This compound matters for its role as a key precursor in the synthesis of high-value dyes, pigments, and functional colorants, offering precise molecular architecture for color development and lightfastness. It is primarily needed by manufacturers in the fine chemicals, specialty dyes, and advanced materials sectors seeking to develop products with specific chromatic and chemical properties.

Application

• Dye and Pigment Intermediate: A crucial building block for synthesizing azo dyes, acid dyes, and reactive dyes, particularly for textiles and leather.
• Functional Colorant Production: Used in the manufacture of colorants for inks, coatings, and plastics where specific solubility and stability are required.
• Chemical Research & Development: Serves as a model compound or starting material in organic synthesis research for novel chromophores.
• Analytical Chemistry Reagent: Potential use as a complexing agent or indicator in specific analytical methods due to its sulphonic acid groups.
• Photographic Chemicals: Can be utilized in the synthesis of certain photographic sensitizers or couplers.

Basic Information

Product Name	4-[(2,4-Dichlorobenzoyl)Amino]-5-Hydroxynaphthalene-1,7-Disulphonic Acid
CAS No.	6528-49-0
Molecular Formula	C₁₇H₁₁Cl₂NO₈S₂
Molecular Weight	508.31 g/mol
Synonyms	5-Hydroxy-4-[(2,4-dichlorobenzoyl)amino]-1,7-naphthalenedisulfonic Acid; 1,7-Naphthalenedisulfonic acid, 4-[(2,4-dichlorobenzoyl)amino]-5-hydroxy-; 4-Amino-5-hydroxy-1,7-naphthalenedisulfonic acid 2,4-dichlorobenzoyl derivative; C.I. 18050; Acid Yellow 40 intermediate; 2,4-Dichlorobenzoylamino J acid; 4-(2,4-Dichlorobenzamido)-5-hydroxy-1,7-naphthalenedisulphonic acid
EINECS	229-426-9

Quality Control

Our 4-[(2,4-Dichlorobenzoyl)Amino]-5-Hydroxynaphthalene-1,7-Disulphonic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for use in sensitive synthesis applications. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from strong acids and incompatible organic solvents.

Specification

Item	Specification
Appearance	Yellow to brownish powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulphated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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