Description

7-Anilino-1-Naphthol-3-Sulfonic Acid is a high-purity, specialized aromatic sulfonic acid derivative that serves as a critical intermediate in advanced chemical synthesis. Its unique molecular structure, featuring both an anilino and a sulfonic acid group on a naphthalene backbone, makes it an essential building block for creating complex dyes, pigments, and functional materials. This compound is particularly valuable for manufacturers and R&D laboratories in the dyestuff, photographic chemical, and analytical reagent industries seeking to develop products with specific chromophoric or chelating properties.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of azo dyes, acid dyes, and other complex colorants, contributing to color fastness and hue.
• Photographic Chemical: Used in the formulation of certain developers and couplers for photographic films and papers.
• Analytical Reagent: Acts as a chelating agent or a chromogenic reagent in analytical chemistry for the detection and quantification of metal ions.
• Chemical Research & Development: Serves as a versatile building block in organic synthesis for pharmaceuticals and advanced materials.
• Textile Auxiliary: Employed in processes where specific dye-fiber interactions or finishing properties are required.

Basic Information

Product Name	7-Anilino-1-Naphthol-3-Sulfonic Acid
CAS No.	119-19-7
Molecular Formula	C₁₆H₁₃NO₄S
Molecular Weight	315.34 g/mol
Synonyms	1-Naphthol-3-sulfonic acid, 7-anilino-; 7-Anilino-1-naphthol-3-sulfonic acid; 7-Anilino-1-naphthol-3-sulphonic acid; 7-Anilino-3-hydroxy-1-naphthalenesulfonic acid; Anilino J acid; 7-Phenylamino-1-naphthol-3-sulfonic acid; 7-(Phenylamino)-1-naphthol-3-sulfonic acid; 7-Anilino-1-hydroxy-3-naphthalenesulfonic acid
EINECS	204-304-9

Quality Control

Our production of 7-Anilino-1-Naphthol-3-Sulfonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including HPLC and spectroscopic methods. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality and performance.

Specification

Item	Specification
Appearance	Off-white to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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