Description

2-(4-Aminophenyl)-2H-Naphtho[1,2-D]Triazole-5-Sulfonic Acid Sodium Salt is a high-purity, water-soluble organic intermediate and functional dye precursor. This compound matters for its role as a key building block in the synthesis of advanced optical brighteners, fluorescent whitening agents, and specialty dyes. Industrial manufacturers and R&D laboratories in the textile, paper, polymer, and specialty chemical sectors require this material for developing products that enhance brightness and color properties.

Application

• Primary intermediate for the synthesis of optical brightening agents (OBAs) and fluorescent whitening agents (FWAs) used in detergents and paper.
• Key precursor in the manufacture of high-performance dyes and pigments for textiles and plastics.
• Functional monomer for creating light-stabilizing additives and UV absorbers in polymer formulations.
• Research chemical for developing fluorescent probes and sensors in analytical and bio-imaging applications.
• Starting material for specialty fine chemicals and pharmaceutical intermediates requiring a triazole-sulfonate structure.
• Component in the production of security inks and authentication markers due to its potential fluorescent properties.

Basic Information

Product Name	2-(4-Aminophenyl)-2H-Naphtho[1,2-D]Triazole-5-Sulfonic Acid Sodium Salt
CAS No.	72102-76-2
Molecular Formula	C18H12N4NaO3S
Molecular Weight	387.37 g/mol
Synonyms	Benzenesulfonic acid, 2-[2-(4-aminophenyl)-2H-naphtho[1,2-d]triazol-5-yl]-, sodium salt; Sodium 2-(4-aminophenyl)-2H-naphtho[1,2-d]triazole-5-sulfonate; 2-(4-Aminophenyl)-2H-benzotriazole-5-sulfonic acid sodium salt (related); Fluorescent Brightener Intermediate; OBA Precursor; FWA Building Block; Aminophenylnaphthotriazole Sulfonate
EINECS	Contact for details

Quality Control

Our production of 2-(4-Aminophenyl)-2H-Naphtho[1,2-D]Triazole-5-Sulfonic Acid Sodium Salt adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling. Certificates of Analysis (COA) documenting identity, purity, and related substances are provided with every shipment to support your quality assurance and regulatory compliance needs.

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). The product may be hygroscopic; keep the container tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%
Solubility (1% in Water)	Clear, yellow solution

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