Description

Disodium 3-[[4-(Acetylamino)Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its primary value lies in its role as a key precursor for synthesizing vibrant and stable acid dyes and reactive dyes used in the textile industry. This compound is essential for manufacturers and R&D facilities specializing in dyestuff production, colorants for specialty papers, and research into novel pigments.

Application

• Primary Intermediate for Acid Dyes: A crucial building block for manufacturing a range of acid dyes used on protein fibers like wool, silk, and nylon.
• Synthesis of Reactive Dyes: Used in the production of reactive dyes for cellulose fibers (cotton, viscose), offering excellent wash-fastness.
• Specialty Colorant Production: Serves as a precursor for creating specific shades of reds, violets, and blues in industrial colorants.
• Laboratory & Research Chemical: Used in chemical research for studying azo dye synthesis, properties, and applications.
• Potential Use in Ink Formulations: May be employed in the development of specialized inks for non-textile applications.

Basic Information

Product Name	Disodium 3-[[4-(Acetylamino)Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	5858-61-7
Molecular Formula	C18H13N3Na2O8S2
Molecular Weight	501.41 g/mol
Synonyms	Acid Red 1; C.I. 18050; Disodium 4-hydroxy-3-[(4-acetamidophenyl)azo]naphthalene-2,7-disulphonate; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-((4-(acetylamino)phenyl)azo)-, disodium salt; Naphthalene Scarlet 4R; Azo Rubine S; Amidonaphthol Red G; C.I. Acid Red 1, disodium salt
EINECS	227-500-9

Quality Control

Our Disodium 3-[[4-(Acetylamino)Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye intermediate applications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Reddish-brown to dark red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	≤ 0.5%

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