Description

7-(Acetylamino)-4-Hydroxy-1-[[2-Sulpho-4-[(4-Sulphophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt 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 reactive and direct dyes, imparting specific color properties and fastness characteristics to the final product. This compound is essential for manufacturers in the textile, leather, and specialty ink industries seeking to produce vibrant and durable colorants. The CAS number for this compound is 83221-52-7.

Application

This specialized azo intermediate is engineered for high-performance colorant synthesis. Its primary and derived applications include:

• Primary Intermediate for Reactive Dyes: Serves as a critical building block in the production of high-washfastness reactive dyes for cotton and other cellulosic fibers.
• Synthesis of Direct Dyes: Used in manufacturing direct dyes for paper, leather, and textile applications requiring good affinity.
• Specialty Ink Pigments: A key component in formulating inks for jet printing and other advanced digital printing technologies.
• Laboratory & Research: Employed in R&D for developing novel chromophores and studying azo dye chemistry and photostability.
• Functional Dye Precursor: Potential use in creating dyes for non-textile applications, such as sensors or light-harvesting materials.

Basic Information

Product Name	7-(Acetylamino)-4-Hydroxy-1-[[2-Sulpho-4-[(4-Sulphophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	83221-52-7
Molecular Formula	C24H16N4Na3O11S3
Molecular Weight	758.61 g/mol
Synonyms	Acid Black 210; C.I. 300317; Sodium 7-acetamido-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-2-naphthalenesulfonate; 7-Acetamido-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-2-naphthalenesulfonic acid trisodium salt; Reactive Black 5 precursor; Trisodium 5-acetamido-4-hydroxy-3-[[4-[(4-sulfonatophenyl)diazenyl]phenyl]diazenyl]naphthalene-2-sulfonate
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to stringent quality protocols to ensure batch-to-batch consistency and purity for sensitive synthesis processes. Quality is verified through multiple analytical checkpoints including HPLC for purity and isomer content, spectrophotometry for strength, and tests for residual intermediates and inorganic salts. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment to support your quality assurance systems.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive) and light-sensitive. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect purity and handling properties.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (as-is basis)
Moisture Content (KF)	≤ 5.0 %
Sulfated Ash	≤ 20.0 %
Water Solubility	Clear solution at 1% w/v
Heavy Metals (as Pb)	≤ 20 ppm

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