Description

1,5-Naphthalenedisulfonic Acid Disodium Salt, Dihydrate, 98 is a high-purity, water-soluble organic salt primarily used as a key intermediate and functional additive in advanced chemical synthesis. This compound matters for its role in producing dyes, optical brighteners, and specialty polymers where consistent sulfonation and solubility are critical. It is needed by manufacturers in the dye and pigment, textile chemical, and polymer industries seeking reliable, high-quality intermediates for their production processes.

Application

• Dye and Pigment Intermediate: A crucial building block in the synthesis of acid dyes, direct dyes, and reactive dyes, providing enhanced water solubility and color fastness.
• Optical Brightener Production: Serves as a key starting material for manufacturing stilbene-based optical brightening agents (OBAs) used in paper, detergents, and textiles.
• Polymer Modification: Used to introduce sulfonate groups into polymers, improving their hydrophilicity, dyeability, and antistatic properties.
• Chemical Synthesis: Acts as a versatile sulfonating agent and anionic surfactant precursor in organic synthesis and specialty chemical manufacturing.
• Textile Auxiliaries: Employed in formulations for leveling agents, dispersants, and other textile processing chemicals.
• Research & Development: Utilized in academic and industrial R&D for developing new sulfonated compounds and studying their properties.

Basic Information

Item	Detail
Product Name	1,5-Naphthalenedisulfonic Acid Disodium Salt, Dihydrate, 98
CAS No.	76758-30-0
Molecular Formula	C10H6Na2O8S2 · 2H2O
Molecular Weight	412.26 g/mol (Dihydrate)
Synonyms	Disodium 1,5-Naphthalenedisulfonate Dihydrate; 1,5-NDS Disodium Salt; Naphthalene-1,5-disulfonic Acid Disodium Salt; 1,5-Naphthalenedisulfonic Acid Sodium Salt; 1,5-NDSA Disodium Salt; Dinatriumnaphthalin-1,5-disulfonat Dihydrat; Acid Naphthalene Disulfonate Sodium Salt
EINECS	Contact for details

Quality Control

Our 1,5-Naphthalenedisulfonic Acid Disodium Salt, Dihydrate is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets the specified 98% purity grade and consistent performance. Certificates of Analysis (COA) documenting identity, purity, and impurity profiles are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0 %
Water Content (KF)	7.0 - 10.0 % (Theoretical for dihydrate: ~8.7%)
pH (5% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Freely soluble in water

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