Description

4-Hydroxy-7-[(4-Methoxyphenyl)Amino]Naphthalen-2-Sulphonic Acid is a specialized organic intermediate with a sulfonic acid group and a complex aromatic structure, making it a valuable building block for advanced chemical synthesis. Its primary commercial value lies in its role as a key precursor in the production of dyes, pigments, and functional colorants. This compound is essential for manufacturers and R&D laboratories in the fine chemicals, specialty dyes, and advanced materials sectors seeking to develop products with specific chromophoric or functional properties.

Application

• Dye and Pigment Intermediate: A critical precursor for synthesizing azo dyes, acid dyes, and other complex colorants used in textiles, inks, and coatings.
• Functional Dye Synthesis: Used in the research and production of dyes for specialized applications, including laser dyes, optical brighteners, and sensitizers.
• Chemical Research & Development: Serves as a versatile building block in organic synthesis for creating novel aromatic compounds with sulfonic acid functionality.
• Analytical Reagent: May be employed as a reagent or standard in analytical chemistry for method development and calibration.
• Pharmaceutical Intermediate: Potential use as a starting material or intermediate in the synthesis of certain pharmacologically active molecules, subject to appropriate purity grades.

Basic Information

Product Name	4-Hydroxy-7-[(4-Methoxyphenyl)Amino]Naphthalen-2-Sulphonic Acid
CAS No.	118-51-4
Molecular Formula	C₁₇H₁₅NO₅S
Molecular Weight	345.37 g/mol
Synonyms	7-[(4-Methoxyphenyl)amino]-4-hydroxy-2-naphthalenesulfonic acid; 4-Hydroxy-7-(p-anisidino)-2-naphthalenesulfonic acid; C.I. 24895; Acid Blue 92 (related dye structure); p-Anisidine-7-hydroxy-2-naphthalenesulfonic acid; 118-51-4; 7-(4-Methoxyanilino)-4-hydroxynaphthalene-2-sulfonic acid
EINECS	204-262-7

Quality Control

Our production of 4-Hydroxy-7-[(4-Methoxyphenyl)Amino]Naphthalen-2-Sulphonic Acid adheres to stringent quality management protocols. Each batch is analytically verified to meet precise specifications for identity, purity, and impurity profiles. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing results from advanced techniques like HPLC and NMR. Our quality systems are designed to ensure batch-to-batch consistency and traceability, supporting your critical R&D and manufacturing processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at ambient temperature (typically 15-25°C). Keep away from strong oxidizing agents and incompatible materials. Due to its complex aromatic structure, prolonged exposure to elevated temperatures or humidity should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Light brown to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 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.