Description

6-Hydroxy-5-[(3-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt is a high-purity azo dye intermediate and analytical reagent. This compound is valued for its precise chemical structure, which provides excellent chromophoric properties and consistent reactivity in synthesis. It is primarily required by manufacturers in the dye and pigment industry, as well as by research laboratories for specialized chemical analysis and development.

Application

• Primary Intermediate for the synthesis of acid dyes and reactive dyes, particularly for textiles like wool, silk, and nylon.
• Key Precursor in the manufacturing of pigments for inks, coatings, and plastics.
• Analytical Reagent in research and quality control laboratories for colorimetric assays and chemical detection.
• Specialty Chemical for the development of biological stains and histology dyes.
• Fine Chemical Building Block for creating more complex azo compounds with specific functional properties.

Basic Information

Product Name	6-Hydroxy-5-[(3-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	85283-70-1
Molecular Formula	C₁₆H₁₀N₂Na₂O₈S₂
Molecular Weight	476.37 g/mol
Synonyms	Acid Orange 20; C.I. 14600; 6-Hydroxy-5-[(3-sulfophenyl)azo]-2-naphthalenesulfonic acid, disodium salt; 5-[(3-Sulfophenyl)azo]-6-hydroxy-2-naphthalenesulfonic acid disodium salt; 2-Naphthalenesulfonic acid, 6-hydroxy-5-[(3-sulfophenyl)azo]-, disodium salt; Orange G; Wool Orange G; L-Orange 2
EINECS	286-543-9

Quality Control

Our 6-Hydroxy-5-[(3-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye intermediate applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is 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 room temperature (15-25°C). Keep away from incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 30.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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