Description

4-[[4-[(2-Hydroxy-5-Methylphenyl)Azo]Phenyl]Azo]Benzenesulfonic Acid Potassium Salt is a high-purity, water-soluble azo dye intermediate and analytical reagent. This compound is valued for its strong chromophore and ability to form stable complexes, making it a critical component in specialized colorant synthesis and chemical detection systems. It is primarily used by manufacturers and R&D laboratories in the dyes and pigments, analytical chemistry, and specialty chemical sectors.

Application

• Primary Intermediate for Azo Dyes and Pigments: Serves as a key building block for synthesizing high-performance orange, red, and brown azo colorants used in textiles, inks, and plastics.
• Analytical Reagent and Indicator: Utilized in complexometric titrations and as a colorimetric indicator in laboratory analysis due to its distinct color change properties.
• Specialty Chemical Synthesis: Acts as a precursor for functional dyes with specific properties, such as laser dyes or sensitizers for photographic and imaging applications.
• Research & Development: Employed in academic and industrial R&D for developing new chromogenic materials, sensors, and diagnostic assays.
• Biological Staining: Potential use in histological staining for microscopy, given its ability to bind to specific tissue components.

Basic Information

Product Name	4-[[4-[(2-Hydroxy-5-Methylphenyl)Azo]Phenyl]Azo]Benzenesulfonic Acid Potassium Salt
CAS No.	68444-06-4
Molecular Formula	C25H19KN4O4S
Molecular Weight	510.61 g/mol
Synonyms	Potassium 4-[[4-[(2-hydroxy-5-methylphenyl)azo]phenyl]azo]benzenesulfonate; 4-[(4-[(2-Hydroxy-5-methylphenyl)azo]phenyl)azo]benzenesulfonic acid potassium salt; Benzenesulfonic acid, 4-[[4-[(2-hydroxy-5-methylphenyl)azo]phenyl]azo]-, potassium salt; Azo dye intermediate K salt; Acid Orange 74 (related); CI 18745 (related); Potassium salt of an azo dye acid; 2-Hydroxy-5-methyl-4'-[(4-sulfophenyl)azo]azobenzene potassium salt
EINECS	Contact for details

Quality Control

Our production of 4-[[4-[(2-Hydroxy-5-Methylphenyl)Azo]Phenyl]Azo]Benzenesulfonic Acid Potassium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, impurity profile, and physical properties.

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 sealed when not in use to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Orange to red-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0

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