Description

1,5-Naphthalenedisulfonic Acid is a versatile aromatic sulfonic acid derivative, primarily valued as a key intermediate in the synthesis of dyes, pigments, and optical brighteners. Its disulfonic acid structure provides excellent water solubility and reactivity, making it a crucial building block for creating complex, color-fast molecules. This compound is essential for manufacturers in the dye and pigment industries, as well as for research and development in specialty chemical synthesis.

Application

• Dye and Pigment Intermediate: A critical precursor in the manufacture of acid dyes, direct dyes, and organic pigments.
• Optical Brightener Synthesis: Used in the production of stilbene-based optical brightening agents (OBAs) for paper, textiles, and detergents.
• Chemical Synthesis: Serves as a building block for pharmaceuticals, agrochemicals, and other specialty organic compounds.
• Catalyst and Additive: Can function as a catalyst or an additive in various polymerization and chemical processes.
• Research & Development: Utilized in academic and industrial R&D for exploring new synthetic pathways and material properties.

Basic Information

Product Name	1,5-Naphthalenedisulfonic Acid
CAS No.	81-04-9
Molecular Formula	C₁₀H₈O₆S₂
Molecular Weight	288.30 g/mol
Synonyms	1,5-NDSA; Naphthalene-1,5-disulfonic Acid; Armstrong's Acid; 1,5-Dihydroxynaphthalene-3,7-disulfonic Acid (tautomer); 1,5-Naphthalene Disulphonic Acid; 1,5-Naphthalenedisulphonic Acid; NSC 4032
EINECS	201-319-7

Quality Control

Our 1,5-Naphthalenedisulfonic Acid is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. Certificates of Analysis (COA) documenting these results are provided with every 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 material is hygroscopic (moisture-sensitive); ensure containers are kept sealed 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%
Water Content (KF)	≤ 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.