Description

3-Methyl-5-[[4-[(3-Sulphophenyl)Azo]-1-Naphthyl]Azo]Salicylic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its core value lies in its ability to impart vibrant and stable color properties to final formulations, making it a critical component for manufacturers requiring precise chromophore synthesis. This compound is primarily needed by producers in the textile dyeing, ink manufacturing, and specialty chemical synthesis industries, where consistent quality and reliable performance are paramount.

Application

• As a key intermediate for the synthesis of acid dyes and direct dyes used in textile applications, particularly for nylon, wool, and silk.
• In the formulation of specialized inks, including inks for jet printing and packaging, where color fastness is critical.
• As a colorant precursor in the production of pigments for plastics, coatings, and paints.
• For research and development purposes in organic synthesis and the creation of novel chromogenic compounds.
• Potential use in the development of analytical reagents and indicators in laboratory settings.
• In the manufacturing of specialty papers and other colored industrial products.

Basic Information

Product Name	3-Methyl-5-[[4-[(3-Sulphophenyl)Azo]-1-Naphthyl]Azo]Salicylic Acid, Sodium Salt
CAS No.	94022-41-0
Molecular Formula	C24H17N4O6SNa
Molecular Weight	512.47 g/mol
Synonyms	Acid Orange 156; C.I. 26501; 3-Methyl-5-[(E)-[4-[(E)-(3-sulfophenyl)diazenyl]naphthalen-1-yl]diazenyl]-2-hydroxybenzoic acid, sodium salt; Salicylic acid, 3-methyl-5-[[4-[(3-sulfophenyl)azo]-1-naphthalenyl]azo]-, monosodium salt; Azo dye intermediate OA-156; Sodium 3-methyl-5-({4-[(3-sulfophenyl)azo]naphthalen-1-yl}azo)salicylate
EINECS	Contact for details

Quality Control

Our production of 3-Methyl-5-[[4-[(3-Sulphophenyl)Azo]-1-Naphthyl]Azo]Salicylic Acid, Sodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, color strength, and impurity profiles. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

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 after opening to prevent absorption of atmospheric moisture, which can affect product performance and stability.

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	Contact for details
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.