Description

4-Hydroxy-6-(3-Sulphoanilino)Naphthalene-2-Sulphonic Acid, Sodium Salt is a specialized organic intermediate belonging to the class of naphthalene sulfonic acid derivatives. This compound is valued for its functional groups which make it a versatile building block in the synthesis of dyes, pigments, and other complex organic molecules. It is primarily sought after by manufacturers in the dyestuff, textile chemical, and specialty chemical industries for producing high-performance colorants and functional additives.

Application

• Primary Intermediate for Azo Dyes and Pigments: Serves as a key coupling component in the synthesis of acid, direct, and reactive dyes for textiles, leather, and paper.
• Functional Additive in Chemical Synthesis: Used in the production of light-sensitive materials and photographic chemicals.
• Research & Development: Employed in academic and industrial R&D labs for developing novel chromophores and functional molecules.
• Specialty Chemical Manufacturing: Acts as a precursor for surfactants and dispersants with specific ionic properties.

Basic Information

Product Name	4-Hydroxy-6-(3-Sulphoanilino)Naphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	83732-47-2
Molecular Formula	C₁₆H₁₂NNaO₇S₂
Molecular Weight	417.39 g/mol
Synonyms	6-Anilino-4-hydroxy-2-naphthalenesulfonic acid, 3'-sulfo-, monosodium salt; Sodium 4-hydroxy-6-[(3-sulfophenyl)amino]-2-naphthalenesulfonate; 4-Hydroxy-6-(3-sulfanilino)-2-naphthalenesulfonic acid sodium salt; Acid Yellow 76 intermediate; C.I. 18850; Naphthalenesulfonic acid, 6-(3-sulfoanilino)-4-hydroxy-, monosodium salt
EINECS	Contact for details

Quality Control

Our production of 4-Hydroxy-6-(3-Sulphoanilino)Naphthalene-2-Sulphonic Acid, Sodium Salt adheres to stringent quality protocols to ensure batch-to-batch consistency and reliability for industrial synthesis. Each lot is analyzed against comprehensive in-house specifications, with a focus on purity, color, and impurity profile. A Certificate of Analysis (COA) detailing key parameters is provided with every shipment to support your quality assurance processes.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Yellow to brownish powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95.0%
Loss on Drying	Max. 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Contact for details

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