Description

Disodium 7-(Acetylamino)-4-Hydroxy-3-[[2-Methyl-4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate 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 dyes and pigments, particularly in the red to violet color spectrum. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance colorants with excellent fastness properties.

Application

• Textile Dyeing: A critical intermediate for the production of reactive and direct dyes used on cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the synthesis of pigments for high-quality printing inks, including those for packaging and publications.
• Industrial Coatings: Serves as a precursor for pigments applied in automotive paints, industrial finishes, and plastic colorants.
• Leather Coloring: Employed in the manufacture of dyes for achieving consistent and durable coloration on leather goods.
• Paper Coloring: Used in the production of dyes for specialty papers and decorative applications.
• Biological Staining: Potential use as an intermediate for histochemical stains and indicators in laboratory settings.
• Research & Development: Serves as a standard or building block in chemical research for novel dye and organic electronic material synthesis.

Basic Information

Product Name	Disodium 7-(Acetylamino)-4-Hydroxy-3-[[2-Methyl-4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate
CAS No.	94023-14-0
Molecular Formula	C25H18N4Na2O9S2
Molecular Weight	636.54 g/mol
Synonyms	7-Acetamido-4-hydroxy-3-{[2-methyl-4-[(4-sulfophenyl)azo]phenyl]azo}naphthalene-2-sulfonic acid disodium salt; C.I. Reactive Red 238; Reactive Red 238; Disodium 7-acetylamino-4-hydroxy-3-{[2-methyl-4-[(4-sulfonatophenyl)azo]phenyl]azo}naphthalene-2-sulfonate; 94023-14-0; Azo dye intermediate RR238; 3-[[2-Methyl-4-[(4-sulfophenyl)azo]phenyl]azo]-7-(acetylamino)-4-hydroxy-2-naphthalenesulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our Disodium 7-(Acetylamino)-4-Hydroxy-3-[[2-Methyl-4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and consistent batch-to-batch performance. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory needs.

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 absorption of atmospheric moisture, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Dark red to violet powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Typical 97-99%)
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Freely soluble in water

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