Description

1-(2-Hydroxy-6-Sulfo-1-Naphthylazo)-2-Naphthol-3,6-Disulfonic Acid is a high-purity, water-soluble azo dye intermediate characterized by its multi-sulfonated naphthalene structure. This compound matters for its role as a critical precursor in the synthesis of specialized dyes and pigments, offering excellent chromophore properties and solubility. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries for producing vivid, stable colors.

Application

• Primary intermediate for the synthesis of acid dyes and direct dyes used in textile coloring, particularly for wool, silk, and nylon.
• Key precursor in manufacturing lake pigments for inks, coatings, and plastics, providing enhanced lightfastness.
• Used in the production of biological stains and histological dyes for laboratory and diagnostic applications.
• Acts as a chelating agent and metal indicator in analytical chemistry and complexometric titrations.
• Intermediate for functional dyes used in sensitizers, optical media, and other high-tech applications.
• Potential use as a corrosion inhibitor intermediate in certain industrial formulations.

Basic Information

Product Name	1-(2-Hydroxy-6-Sulfo-1-Naphthylazo)-2-Naphthol-3,6-Disulfonic Acid
CAS No.	32884-46-1
Molecular Formula	C₂₀H₁₂N₂O₁₀S₃
Molecular Weight	536.51 g/mol
Synonyms	Acid Black 52; C.I. 15711; 1-(2-Hydroxy-6-sulfo-1-naphthylazo)-2-naphthol-3,6-disulfonic acid; 2-Naphthalenol, 1-[(2-hydroxy-6-sulfo-1-naphthalenyl)azo]-3,6-disulfo-; 1-(2-Hydroxy-6-sulfonaphth-1-ylazo)-2-naphthol-3,6-disulfonic acid; Naphthol AS derivative; Trisulfonated azo dye intermediate
EINECS	Contact for details

Quality Control

Our 1-(2-Hydroxy-6-Sulfo-1-Naphthylazo)-2-Naphthol-3,6-Disulfonic Acid undergoes rigorous quality testing to ensure compliance with industry standards. We employ advanced analytical techniques including HPLC and spectrophotometry to verify identity, purity, and consistency. Certificates of Analysis (COA) detailing batch-specific results are available upon request to support your quality assurance protocols.

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 tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Completely soluble

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