Description

Naphthionic Acid CAS NO 84-86-6 is a key aromatic sulfonic acid derivative, primarily known as 4-Amino-1-naphthalenesulfonic acid. This versatile intermediate is crucial for the synthesis of azo dyes and pigments, offering excellent coupling properties and color fastness. It is an essential raw material for manufacturers in the dye and pigment, textile, and specialty chemical industries seeking to produce vibrant, stable colors.

Application

• Azo Dye & Pigment Synthesis: Serves as a critical diazo component for producing a wide range of orange, red, and brown dyes.
• Textile Dyeing & Printing: Used in the formulation of dyes for coloring natural and synthetic fibers like cotton, wool, and nylon.
• Biological Staining: Employed in the preparation of histological stains for microscopy and laboratory analysis.
• Chemical Intermediate: Acts as a building block for more complex sulfonated compounds and specialty surfactants.
• Research & Development: Utilized in academic and industrial R&D for novel chromophore and material synthesis.

Basic Information

Product Name	Naphthionic Acid
CAS No.	84-86-6
Molecular Formula	C10H9NO3S
Molecular Weight	223.25 g/mol
Synonyms	4-Amino-1-naphthalenesulfonic Acid; 1-Naphthylamine-4-sulfonic Acid; 4-Aminonaphthalene-1-sulfonic Acid; Peri Acid; 1,4-Cleve's Acid; 4-Amino-1-naphthalenesulphonic Acid; 1-Aminonaphthalene-4-sulfonic Acid
EINECS	201-567-7

Quality Control

Our Naphthionic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC and titration methods, to ensure high purity and consistency. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications.

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). This product is hygroscopic (moisture-sensitive); ensure containers are kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light gray powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
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.