Description

1,6-Naphthalenedisulfonic Acid is a versatile organic acid derivative, primarily used 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 valuable building block for creating complex molecules. This compound is essential for manufacturers in the dye and pigment, polymer, and fine chemical industries seeking to develop high-performance products.

Application

• Dye and Pigment Intermediate: A critical precursor in the synthesis of acid dyes, direct dyes, and reactive dyes, contributing to color fastness and brilliance.
• Optical Brightener Production: Serves as a core component in manufacturing stilbene-based optical brightening agents (OBAs) used in paper, textiles, and detergents.
• Polymer Additive Synthesis: Used to create sulfonated monomers or additives that enhance the hydrophilicity, dyeability, or antistatic properties of polymers.
• Fine Chemical Building Block: Employed in organic synthesis for pharmaceuticals, agrochemicals, and other specialty chemicals requiring a naphthalene backbone with sulfonic acid functionality.
• Surfactant and Dispersant Manufacturing: Acts as an intermediate for producing anionic surfactants and dispersants with good wetting and emulsifying properties.
• Research and Development: Utilized in chemical research for studying sulfonation reactions and developing new materials.

Basic Information

Product Name	1,6-Naphthalenedisulfonic Acid
CAS No.	525-37-1
Molecular Formula	C10H8O6S2
Molecular Weight	288.30 g/mol
Synonyms	Naphthalene-1,6-disulfonic Acid; 1,6-NDSA; 1,6-Naphthalene Disulfonate; 1,6-Dihydroxynaphthalene-3,7-disulfonic Acid (tautomer); 1,6-Naphthalenedisulphonic Acid; NSC 4036; 1,6-NDA
EINECS	208-371-0

Quality Control

Our 1,6-Naphthalenedisulfonic Acid is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. A Certificate of Analysis (COA) detailing the results is provided with each shipment to guarantee traceability and compliance with your quality requirements.

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 product is hygroscopic (moisture-sensitive) and a strong acid; ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture and store away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 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.