Description

4-(Acetylamino)-5-Hydroxynaphthalene-1,7-Disulphonic Acid is a high-purity, functionalized naphthalene derivative of significant industrial importance. This compound serves as a critical intermediate in the synthesis of dyes, pigments, and specialty chemicals, valued for its dual sulphonic acid groups and reactive hydroxyl and acetylamino functionalities. It is essential for manufacturers in the colorant, fine chemical, and pharmaceutical intermediate sectors seeking reliable, high-quality raw materials for complex synthesis.

Application

• Primary intermediate in the manufacture of azo dyes and pigments, particularly for textiles and inks.
• Key building block for sulfonated naphthalene-based specialty chemicals used as dispersants or surfactants.
• Precursor in the synthesis of pharmaceutical intermediates and active pharmaceutical ingredients (APIs).
• Used in research and development for creating novel functional dyes with specific light-absorption properties.
• Intermediate for optical brightening agents and fluorescent whitening compounds.
• Starting material for complexing agents and chelating molecules in analytical chemistry.

Basic Information

Product Name	4-(Acetylamino)-5-Hydroxynaphthalene-1,7-Disulphonic Acid
CAS No.	6409-21-8
Molecular Formula	C₁₂H₁₁NO₈S₂
Molecular Weight	369.35 g/mol
Synonyms	5-Hydroxy-4-acetamido-1,7-naphthalenedisulfonic Acid; 4-Acetamido-5-hydroxy-1,7-naphthalenedisulfonic Acid; 1,7-Naphthalenedisulfonic acid, 4-(acetylamino)-5-hydroxy-; 4-Acetylamino-5-hydroxynaphthalene-1,7-disulfonic Acid; 4-Acetamido-5-hydroxynaphthalene-1,7-disulphonic Acid; H Acid Derivative; 4-Acetamido-5-hydroxy-1,7-NDSA
EINECS	229-084-8

Quality Control

Our production of 4-(Acetylamino)-5-Hydroxynaphthalene-1,7-Disulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting customer specifications. A Certificate of Analysis (COA) detailing all critical parameters is provided with each shipment to guarantee traceability and compliance.

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 when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Off-white to light brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%, Total impurities ≤ 2.0%

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