Description

6-Hydroxy-5-[(2-Methyl-4-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid is a synthetic organic azo compound primarily utilized as a key dye intermediate. Its molecular structure is engineered to provide excellent chromophoric properties, making it essential for producing vibrant and stable colorants. This product is critical for manufacturers in the dye and pigment industries seeking reliable intermediates for high-performance applications.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for coloring textiles like wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of lake pigments and organic pigments for inks, paints, and coatings, offering good lightfastness.
• Specialty Colorants: Employed in the formulation of specialty dyes for leather, paper, and food packaging inks where specific color properties are required.
• Research & Development: Acts as a standard or starting material in chemical R&D for developing new chromophores and studying azo coupling reactions.

Basic Information

Product Name	6-Hydroxy-5-[(2-Methyl-4-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid
CAS No.	37672-58-5
Molecular Formula	C₁₇H₁₃N₂O₇S₂
Molecular Weight	421.42 g/mol
Synonyms	6-Hydroxy-5-[(2-methyl-4-sulfophenyl)azo]-2-naphthalenesulfonic acid; C.I. 15865; Acid Yellow 40 intermediate; 2-Naphthalenesulfonic acid, 6-hydroxy-5-[(2-methyl-4-sulfophenyl)azo]-; 5-[(2-Methyl-4-sulfophenyl)azo]-6-hydroxy-2-naphthalenesulfonic acid; Azo dye intermediate 37672-58-5; 6-Hydroxy-5-(2-methyl-4-sulfophenylazo)naphthalene-2-sulfonic acid
EINECS	Contact for details

Quality Control

Our production of 6-Hydroxy-5-[(2-Methyl-4-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet the specifications required for high-end dye synthesis. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance processes.

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 sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
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	Freely soluble

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