Description

2-Naphthol-3,7-Naphthalenedisulfonic Acid Disodium Salt is a high-purity, water-soluble aromatic sulfonate derivative valued for its role as a key intermediate and functional additive. Its molecular structure provides excellent chelating and dispersing properties, making it a critical component in advanced formulations. This product is essential for manufacturers in the dye, pigment, and specialty chemical industries seeking consistent quality and reliable performance.

Application

• Dye and Pigment Intermediate: A crucial building block in the synthesis of acid dyes, reactive dyes, and high-performance pigments.
• Textile Auxiliary: Used as a leveling agent, dispersant, or chelating agent in dyeing and printing processes.
• Analytical Chemistry Reagent: Serves as a complexometric agent or indicator in specific titration methods.
• Photographic Chemical: Employed in the formulation of certain developers and sensitizers.
• Corrosion Inhibitor Formulation: Acts as a component in water treatment chemicals and metal surface treatment solutions.
• Research & Development: Utilized in academic and industrial labs for organic synthesis and material science research.

Basic Information

Product Name	2-Naphthol-3,7-Naphthalenedisulfonic Acid Disodium Salt
CAS No.	83949-45-5
Molecular Formula	C₂₀H₁₂Na₂O₈S₂
Molecular Weight	490.41 g/mol
Synonyms	3,7-Naphthalenedisulfonic acid, 2-hydroxy-, disodium salt; 2-Hydroxy-3,7-naphthalenedisulfonic acid disodium salt; Disodium 2-hydroxy-3,7-naphthalenedisulfonate; 2-Naphthol-3,7-disulfonic acid disodium salt; Acid Brown 14 intermediate; Naphthol AS-BS related intermediate
EINECS	Contact for details

Quality Control

Our 2-Naphthol-3,7-Naphthalenedisulfonic Acid Disodium Salt is manufactured under a stringent quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for industrial and laboratory use. Certificates of Analysis (COA) documenting batch-specific results are available upon request to support your quality assurance protocols.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Light yellow to beige powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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