Description

1,2,7-Naphthalenetrisulfonic Acid is a specialized organic sulfonic acid derivative, a key intermediate in the synthesis of high-value dyes and optical brighteners. Its multi-sulfonated aromatic structure provides excellent water solubility and reactivity, making it a crucial building block for creating complex, functional molecules. This compound is primarily utilized by manufacturers in the dye, pigment, and specialty chemical industries seeking to develop products with enhanced performance characteristics.

Application

• Dye & Pigment Intermediate: A critical precursor in the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for textiles like wool, silk, and nylon.
• Optical Brightener (OBA) Synthesis: Serves as a fundamental building block for manufacturing stilbene-based optical brightening agents used in paper, detergents, and plastics.
• Specialty Surfactant Production: Used to create advanced anionic surfactants with high solubility and complexing properties for niche industrial applications.
• Chemical Research & Development: Employed as a model compound or starting material in organic synthesis and pharmaceutical research due to its polyfunctional nature.
• Electroplating Additives: Can be utilized in formulating brighteners and leveling agents for specific metal plating baths.
• Catalyst & Ligand Preparation: Its sulfonic acid groups make it a candidate for creating solid acid catalysts or metal-complexing ligands.

Basic Information

Product Name	1,2,7-Naphthalenetrisulfonic Acid
CAS No.	47199-71-3
Molecular Formula	C₁₀H₈O₉S₃
Molecular Weight	400.36 g/mol
Synonyms	Naphthalene-1,2,7-trisulfonic Acid; 1,2,7-NTSA; 1-Naphthol-2,7-disulfonic Acid (related derivative); Trisulfonated Naphthalene; Naphthalenetrisulfonate; Acid Naphthalene Trisulfonic Acid
EINECS	Contact for details

Quality Control

Our production of 1,2,7-Naphthalenetrisulfonic Acid adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including assay (HPLC), identification (IR), and impurity profiling, to ensure consistency and meet customer specifications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment, guaranteeing traceability and compliance with agreed-upon standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect quality and handling properties.

Specification

Item	Specification
Appearance	Off-white to light tan powder or crystals
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfate 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.