Description

7-Amino-4-[(Phenylsulfonyl)Oxy]-2-Naphthalenesulfonic Acid is a specialized naphthalene-based sulfonic acid derivative, serving as a critical high-purity intermediate in advanced organic synthesis. Its unique bifunctional structure, featuring both amino and sulfonyloxy groups, makes it a valuable precursor for constructing complex molecules with specific electronic and steric properties. This compound is primarily utilized by research institutions and manufacturers in the pharmaceutical and specialty chemical sectors for developing active pharmaceutical ingredients (APIs), dyes, and functional materials.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of novel drug candidates, particularly those requiring naphthalene sulfonate scaffolds.
• Dye and Pigment Synthesis: Acts as a precursor for manufacturing specialized azo dyes and high-performance pigments due to its sulfonic acid group, which improves water solubility and fiber affinity.
• Functional Material Research: Used in the development of organic semiconductors, liquid crystals, and photoactive materials where its conjugated system is advantageous.
• Chemical Research & Development: Serves as a versatile reagent for academic and industrial R&D in organic chemistry, enabling the study of sulfonation and amination reactions.
• Specialty Surfactant Production: Potential intermediate for creating anionic surfactants with specific branching and aromatic character for niche industrial applications.

Basic Information

Product Name	7-Amino-4-[(Phenylsulfonyl)Oxy]-2-Naphthalenesulfonic Acid
CAS No.	68003-35-0
Molecular Formula	C₁₆H₁₃NO₆S₂
Molecular Weight	379.41 g/mol
Synonyms	7-Amino-4-(phenylsulfonyloxy)-2-naphthalenesulfonic acid; 2-Naphthalenesulfonic acid, 7-amino-4-[(phenylsulfonyl)oxy]-; 4-[(Phenylsulfonyl)oxy]-7-amino-2-naphthalenesulfonic acid; 7-Amino-4-(benzenesulfonyloxy)-2-naphthalenesulfonic acid; 7-Amino-4-phenoxysulfonyl-2-naphthalenesulfonic acid; 68003-35-0; 7-Amino-4-(phenylsulfonyloxy)naphthalene-2-sulfonic acid
EINECS	Contact for details

Quality Control

Our production of 7-Amino-4-[(Phenylsulfonyl)Oxy]-2-Naphthalenesulfonic 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, NMR, and mass spectrometry to confirm identity and quantify impurities. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and specific impurity profiles is 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed under dry conditions to prevent absorption of atmospheric moisture, which can affect stability and handling properties.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (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.