Description

3-Hydroxy-4-[(2-Methylphenyl)Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate. This compound is valued for its role as a key precursor in the synthesis of vibrant and stable colorants. It is primarily required by manufacturers in the dye and pigment industries, as well as by research and development laboratories focusing on advanced material science and color chemistry.

Application

• Primary Intermediate for Azo Dyes: Essential for synthesizing a range of orange to red azo dyes and pigments.
• Textile Dyeing: Used in the production of dyes for coloring natural and synthetic fibers.
• Paper Coloring: Serves as a precursor for dyes used in specialty paper and packaging.
• Leather Finishing: Employed in the manufacture of dyes for leather goods.
• Ink Formulation: A key component in the production of industrial and printing inks.
• Research & Development: Used as a standard or building block in chemical research for new chromophores.
• Analytical Reagent: Potential use as a colorimetric indicator or reagent in specific analytical methods.

Basic Information

Product Name	3-Hydroxy-4-[(2-Methylphenyl)Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt
CAS No.	5858-30-0
Molecular Formula	C₁₇H₁₃N₂Na₂O₇S₂
Molecular Weight	474.40 g/mol
Synonyms	Acid Orange 20 (disodium salt); C.I. 14600; 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-[(2-methylphenyl)azo]-, disodium salt; 4-[(2-Methylphenyl)azo]-3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt; Orange GGN; Tropaeolin G; 2-Naphthol Orange G; 3-Hydroxy-4-(o-tolylazo)naphthalene-2,7-disulfonic acid disodium salt
EINECS	227-490-9

Quality Control

Our 3-Hydroxy-4-[(2-Methylphenyl)Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for industrial synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

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

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