Description

4-[(4-Aminobenzoyl)Amino]-5-Hydroxynaphthalene-2,7-Disulphonic Acid is a high-purity, functionalized naphthalene derivative that serves as a critical advanced intermediate in the synthesis of complex organic molecules. Its value lies in its bifunctional structure, featuring both an aromatic amine and sulphonic acid groups, which enables precise chemical modifications for specialized applications. This compound is essential for manufacturers in the dye, pigment, and specialty chemical industries seeking to develop products with specific chromophoric or complexing properties.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of high-value azo dyes, acid dyes, and reactive dyes, particularly for textiles and leather.
• Specialty Chemical Synthesis: Used as a building block for creating complex organic molecules in pharmaceutical research and fine chemical production.
• Complexing Agent Precursor: Its structure makes it suitable for developing ligands and chelating agents used in analytical chemistry and metal ion sequestration.
• Research & Development: Employed in academic and industrial R&D labs for studying sulfonated aromatic compounds and their properties.
• Photographic Chemical: Can be utilized in the synthesis of certain photographic chemicals and sensitizers.

Basic Information

Product Name	4-[(4-Aminobenzoyl)Amino]-5-Hydroxynaphthalene-2,7-Disulphonic Acid
CAS No.	6505-35-7
Molecular Formula	C17H14N2O8S2
Molecular Weight	438.43 g/mol
Synonyms	5-Amino-4-[(4-aminobenzoyl)amino]-2,7-naphthalenedisulfonic acid; 4-[(4-Aminobenzoyl)amino]-5-hydroxy-2,7-naphthalenedisulfonic acid; 5-Hydroxy-4-[(4-aminobenzoyl)amino]naphthalene-2,7-disulfonic acid; 1-Amino-2-[(4-aminobenzoyl)amino]-5,8-dihydroxynaphthalene-3,6-disulfonic acid (tautomeric form); C.I. 37245; Acid Yellow 36 intermediate; Benzenesulfonic acid, 4-amino-, coupled with diazotized 4-aminobenzoic acid derivative
EINECS	229-400-5

Quality Control

Our production of 4-[(4-Aminobenzoyl)Amino]-5-Hydroxynaphthalene-2,7-Disulphonic Acid adheres to a strict quality management system to ensure batch-to-batch consistency and reliability for industrial synthesis. Every lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. Certificates of Analysis (COA) detailing all critical parameters are provided and can be tailored to meet specific customer or regulatory requirements.

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 nature, the container must be kept tightly sealed after each use to prevent moisture absorption, which can affect stability and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellow to brownish powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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