Description

Sodium 7-Aminonaphthalene-1-Sulphonate is a high-purity, water-soluble aromatic sulfonate salt primarily used as a key intermediate in the synthesis of dyes, pigments, and fluorescent markers. Its value lies in its reactive amino and sulfonate groups, which allow for versatile chemical modifications to create compounds with specific coloristic and functional properties. This product is essential for manufacturers in the dye and pigment industry, as well as for research institutions developing advanced materials and diagnostic reagents.

Application

• Primary intermediate for the synthesis of azo dyes and acid dyes used in textiles, leather, and paper.
• Key building block in the production of fluorescent whitening agents (optical brighteners) for detergents and plastics.
• Precursor for naphthalimide-based fluorescent dyes and sensors used in biological imaging and analytical chemistry.
• Intermediate in the manufacture of pigments and colorants for inks and coatings.
• Starting material for research into functional organic materials, including liquid crystals and organic semiconductors.
• Used in the synthesis of reactive dyes for cellulose fibers like cotton and viscose.

Basic Information

Product Name	Sodium 7-Aminonaphthalene-1-Sulphonate
CAS No.	27931-06-2
Molecular Formula	C10H8NNaO3S
Molecular Weight	245.23 g/mol
Synonyms	7-Amino-1-naphthalenesulfonic acid sodium salt; 1-Naphthalenesulfonic acid, 7-amino-, sodium salt; Sodium 7-amino-1-naphthalenesulfonate; 7-Amino-1-naphthalenesulfonate sodium salt; 8-Aminonaphthalene-2-sulfonic acid sodium salt (alternative numbering); 7-Amino-1-naphthalenesulphonate; Acid Red 337 intermediate; C.I. 17200 intermediate
EINECS	Contact for details

Quality Control

Our Sodium 7-Aminonaphthalene-1-Sulphonate is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with every shipment and is available upon request.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	Off-white to light beige powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	Conforms
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%
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.