Description

Disodium 5-(Acetylamino)-3-[(Dimethylphenyl)Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing vibrant and stable colorants, particularly in applications requiring specific hue and fastness properties. It is primarily utilized by manufacturers in the textile, ink, and specialty chemical industries for the production of dyes and pigments.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid dyes and direct dyes for textiles, especially polyamide (nylon) and protein fibers (wool, silk).
• Specialty Ink Formulations: Used in the manufacture of colorants for inks in packaging, security printing, and digital applications.
• Pigment Manufacturing: Acts as a precursor in the production of lake pigments and other insoluble colorants for plastics and coatings.
• Biological Staining: Potential use as a staining agent in histology and microscopy due to its specific chromophore structure.
• Research & Development: Employed in chemical research for studying azo coupling reactions and developing novel chromogenic materials.

Basic Information

Product Name	Disodium 5-(Acetylamino)-3-[(Dimethylphenyl)Azo]-4-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	12167-45-2
Molecular Formula	C26H23N4Na2O8S2
Molecular Weight	628.58 g/mol
Synonyms	Acid Orange 156; C.I. 26501; Disodium 5-acetamido-4-hydroxy-3-[(4-dimethylamino)phenyl]azo]naphthalene-2,7-disulfonate; 5-Acetamido-4-hydroxy-3-[(4-dimethylaminophenyl)azo]naphthalene-2,7-disulfonic acid disodium salt; Azo dye intermediate 12167-45-2; Naphthalene disulfonic acid derivative; 4-Hydroxy-3-[(4-dimethylaminophenyl)azo]-5-acetamido-2,7-naphthalenedisulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our production of Disodium 5-(Acetylamino)-3-[(Dimethylphenyl)Azo]-4-Hydroxynaphthalene-2,7-Disulphonate adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. All materials undergo comprehensive analytical testing, including HPLC for assay and impurity profiling, to meet exacting customer specifications. A Certificate of Analysis (COA) detailing identity, purity, and related substances is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep away from strong oxidizing agents. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%
Solubility (in Water)	Freely soluble

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