Description

4-Aminobenzoyl-5-Hydroxynaphthalene-2,7-Disulphonic Acid is a specialized organic intermediate featuring a naphthalene core functionalized with sulphonic acid, hydroxyl, and aminobenzoyl groups. This unique structure makes it a valuable precursor for synthesizing high-performance dyes, pigments, and optical brighteners. It is primarily sought after by manufacturers in the fine chemicals, specialty dyes, and advanced material science sectors for creating products with specific coloristic and functional properties.

Application

• Key intermediate for the synthesis of acid dyes and reactive dyes used in textile coloring.
• Precursor in the manufacture of optical brightening agents (OBAs) for paper, detergents, and plastics.
• Building block for specialty pigments with enhanced lightfastness and thermal stability.
• Used in research and development of functional dyes for non-textile applications, such as lasers and sensors.
• Intermediate in the production of liquid crystal dyes and other advanced electronic materials.
• Starting material for synthesizing biologically active compounds in pharmaceutical research.

Basic Information

Product Name	4-Aminobenzoyl-5-Hydroxynaphthalene-2,7-Disulphonic Acid
CAS No.	71436-94-7
Molecular Formula	C₁₇H₁₃NO₈S₂
Molecular Weight	423.42 g/mol
Synonyms	5-Hydroxy-4-[(4-aminobenzoyl)amino]naphthalene-2,7-disulfonic Acid; 4-Amino-N-(5-hydroxy-2,7-disulfo-1-naphthyl)benzamide; 1-Naphthalenesulfonic acid, 4-[(4-aminobenzoyl)amino]-5-hydroxy-2,7-disulfo-; Aminobenzoyl H Acid derivative; ABH Acid; Dye Intermediate 71436-94-7
EINECS	Contact for details

Quality Control

Our production of 4-Aminobenzoyl-5-Hydroxynaphthalene-2,7-Disulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request and are integral to our commitment to supply chain transparency and reliability.

Storage

Preserve in a tightly closed container, protected from light. Due to its hygroscopic nature, the material should be stored in a cool, dry, and well-ventilated area. Recommended storage temperature is 15-25°C. Keep the container tightly sealed when not in use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Light yellow to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulphated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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