Description

3-[[2-[(n-Ethyl-n-Phenylamino)Sulfonyl]Phenyl]Azo]-4-Hydroxy-1-Naphthalenesulfonic Acid Sodium Salt is a high-purity azo dye intermediate and analytical reagent known for its precise chromogenic properties. This compound is critical for applications requiring consistent color development and reliable chemical reactivity. It is primarily utilized by manufacturers in the dye and pigment industry, as well as by research and quality control laboratories for specialized chemical analysis.

Application

• Dye and Pigment Manufacturing: A key intermediate for synthesizing specific azo dyes and colorants used in textiles, inks, and plastics.
• Analytical Chemistry: Employed as a chromogenic reagent in spectrophotometric assays and complexometric titrations for metal ion detection.
• Research & Development: Used in chemical research to study azo coupling reactions and develop new functional materials.
• Laboratory Reagent: Serves as a standard or reagent in quality control (QC) and analytical laboratories for method validation.
• Specialty Chemical Synthesis: A building block for creating more complex sulfonated azo compounds with specific industrial applications.

Basic Information

Product Name	3-[[2-[(n-Ethyl-n-Phenylamino)Sulfonyl]Phenyl]Azo]-4-Hydroxy-1-Naphthalenesulfonic Acid Sodium Salt
CAS No.	82944-40-9
Molecular Formula	C25H21N4O6S2Na
Molecular Weight	584.58 g/mol
Synonyms	Acid Red 337; C.I. 17200; Sodium 3-[[2-[(N-ethyl-N-phenylamino)sulfonyl]phenyl]azo]-4-hydroxy-1-naphthalenesulfonate; 4-Hydroxy-3-[[2-[(N-ethyl-N-phenylamino)sulfonyl]phenyl]azo]-1-naphthalenesulfonic acid sodium salt; N-Ethyl-N-phenyl-2-[(4-sulfo-1-naphthyl)azo]benzenesulfonamide sodium salt; Azo dye intermediate 82944-40-9; 1-Naphthalenesulfonic acid, 3-[[2-[(ethylphenylamino)sulfonyl]phenyl]azo]-4-hydroxy-, sodium salt
EINECS	Contact for details

Quality Control

Our 3-[[2-[(n-Ethyl-n-Phenylamino)Sulfonyl]Phenyl]Azo]-4-Hydroxy-1-Naphthalenesulfonic Acid Sodium 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 precise specifications for critical applications. Certificates of Analysis (COA) documenting all relevant parameters are available upon request to support your quality assurance protocols.

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 minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Reddish-brown to dark red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition (Sulfated Ash)	Contact for details
Solubility	Soluble in water, methanol

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