Description

7-Acetylamino-4-Hydroxy-3-(2-Sulfophenylazo)Naphthalene-2-Sulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its value lies in its role as a key precursor for synthesizing specific, high-performance dyes and pigments, particularly those requiring excellent lightfastness and water solubility. This compound is essential for manufacturers in the textile, ink, and specialty chemical sectors seeking to produce vibrant and stable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes and direct dyes for textiles like wool, silk, and nylon.
• Specialty Pigment Manufacturing: Used in the production of high-performance pigments for inks, coatings, and plastics where color stability is paramount.
• Biological Staining Reagents: Potential use as a precursor for developing histological stains and indicators in laboratory settings.
• Research & Development: Employed in chemical research for studying azo coupling reactions and developing novel chromophores.
• Analytical Chemistry: Can be utilized as a complexometric agent or indicator in certain titration methods.

Basic Information

Product Name	7-Acetylamino-4-Hydroxy-3-(2-Sulfophenylazo)Naphthalene-2-Sulfonic Acid Disodium Salt
CAS No.	3443-89-8
Molecular Formula	C18H13N3Na2O9S2
Molecular Weight	533.41 g/mol
Synonyms	Acid Yellow 40 (C.I. 18950); 7-Acetamido-4-hydroxy-3-(2-sulfophenylazo)naphthalene-2-sulfonic acid disodium salt; 2-Naphthalenesulfonic acid, 7-(acetylamino)-4-hydroxy-3-[(2-sulfophenyl)azo]-, disodium salt; C.I. 18950; Disodium 7-acetamido-4-hydroxy-3-(2-sulfophenylazo)naphthalene-2-sulfonate; Yellow GS; Azo dye intermediate 3443-89-8
EINECS	222-350-1

Quality Control

Our 7-Acetylamino-4-Hydroxy-3-(2-Sulfophenylazo)Naphthalene-2-Sulfonic Acid Disodium Salt is manufactured 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 dye synthesis. Certificates of Analysis (COA) detailing batch-specific results are provided to guarantee consistent quality and performance for your production 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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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