Description

1,5-Naphthalenedisulfonic acid is a versatile aromatic sulfonic acid derivative, primarily valued as a key intermediate in the synthesis of dyes, optical brighteners, and specialty chemicals. Its disulfonic acid structure provides excellent water solubility and reactivity, making it a crucial building block for creating more complex functional molecules. This compound is essential for manufacturers in the dye, pigment, and polymer industries seeking to develop products with specific coloristic or performance properties.

Application

• Dye and Pigment Intermediate: A critical precursor in the manufacture of acid dyes, direct dyes, and reactive dyes, particularly for textiles and leather.
• Optical Brightener Production: Serves as a key starting material for synthesizing stilbene-based optical brightening agents (OBAs) used in paper, detergents, and plastics.
• Polymer and Resin Modification: Used to introduce sulfonic acid groups into polymers to enhance hydrophilicity, dyeability, or ion-exchange properties.
• Chemical Synthesis: Acts as a versatile building block for organic synthesis, including the production of pharmaceuticals and agrochemical intermediates.
• Catalyst and Surfactant Precursor: Can be utilized to develop specialized catalysts or surfactant molecules due to its strong acid functionality.
• Research and Development: Employed in laboratory settings for methodological development and the creation of novel chemical entities.

Basic Information

Product Name	1,5-Naphthalenedisulfonic Acid
CAS No.	29-68-5
Molecular Formula	C10H8O6S2
Molecular Weight	288.30 g/mol
Synonyms	1,5-Naphthalene Disulfonic Acid; Naphthalene-1,5-disulfonic Acid; 1,5-NDSA; 1,5-Dihydroxynaphthalene-3,7-disulfonic Acid (tautomer); NSC 40326; Dinaphthalene Disulfonic Acid; Armohib 28 (trade name variant)
EINECS	249-377-1

Quality Control

Our 1,5-Naphthalenedisulfonic acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. Certificates of Analysis (COA) detailing results from methods such as HPLC, titration, and loss on drying are provided to guarantee consistent quality and traceability for your production 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). This material is hygroscopic (moisture-sensitive); ensure containers are sealed immediately after use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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