Description

4-[[5-[(5-Chloro-2-Hydroxyphenyl)Azo]-2,4-Dihydroxyphenyl]Azo]Naphthalene-1-Sulphonic Acid, Sodium Salt is a high-purity, synthetic azo dye intermediate known for its vibrant color properties and chemical stability. This compound is critical for manufacturers requiring precise and consistent chromophores for advanced dye and pigment synthesis. It is primarily utilized by the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Textile Dyeing: As a key intermediate for synthesizing acid dyes and direct dyes for wool, silk, nylon, and paper.
• Ink Formulation: Used in the production of pigments for printing inks, including inks for packaging and security applications.
• Specialty Pigments: Serves as a precursor for creating high-value, complex organic pigments with specific lightfastness and thermal stability.
• Biological Staining: Potential use as an intermediate for histological stains and indicators in laboratory settings.
• Research & Development: Employed in chemical research for studying azo coupling reactions and developing novel chromogenic materials.
• Functional Dyes: Intermediate for dyes used in non-textile applications such as lasers, optical data storage, and liquid crystal displays (LCDs).

Basic Information

Item	Details
Product Name	4-[[5-[(5-Chloro-2-Hydroxyphenyl)Azo]-2,4-Dihydroxyphenyl]Azo]Naphthalene-1-Sulphonic Acid, Sodium Salt
CAS No.	93892-22-9
Molecular Formula	C22H14ClN4NaO6S
Molecular Weight	528.88 g/mol
Synonyms	Acid Red 337 (C.I. 17200); Sodium 4-[(5-[(5-chloro-2-hydroxyphenyl)diazenyl]-2,4-dihydroxyphenyl)diazenyl]naphthalene-1-sulfonate; 1-Naphthalenesulfonic acid, 4-[[5-[(5-chloro-2-hydroxyphenyl)azo]-2,4-dihydroxyphenyl]azo]-, sodium salt; C.I. 17200; Azo dye intermediate 93892-22-9; 5-[(5-Chloro-2-hydroxyphenyl)azo]-2,4-dihydroxyazobenzene-4'-sulfonic acid sodium salt
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Every lot is tested against established specifications, including identity confirmation, assay, and impurity profile analysis. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee compliance with your technical requirements.

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 moisture absorption and degradation.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%
Solubility	Soluble in water, ethanol

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