Description

Potassium Sodium Dihydrogen 5,5'-[Carbonylbis[Imino(5-Methoxy-2-Sulphonato-4,1-Phenylene)Azo]]Bis[6-Amino-4-Hydroxynaphthalene-2-Sulphonate] is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its role in synthesizing specialized dyes and pigments, offering excellent color strength and stability. It is primarily sought by manufacturers in the textile, ink, and specialty chemical sectors for producing high-performance colorants.

Application

• Textile Dyeing: A key intermediate for the synthesis of reactive and direct dyes used on cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of high-quality pigments for printing inks, including inks for packaging and textiles.
• Specialty Pigments: Serves as a precursor for creating complex, high-stability pigments used in coatings and plastics.
• Biological Staining: Potential use as an intermediate for developing histological stains and indicators in laboratory settings.
• Research & Development: Employed in chemical research for studying azo dye chemistry and developing novel chromophores.
• Paper Coloring: Can be utilized in the manufacture of dyes for specialty paper products.

Basic Information

Product Name	Potassium Sodium Dihydrogen 5,5'-[Carbonylbis[Imino(5-Methoxy-2-Sulphonato-4,1-Phenylene)Azo]]Bis[6-Amino-4-Hydroxynaphthalene-2-Sulphonate]
CAS No.	83221-55-0
Molecular Formula	C44H28K2N10Na2O20S4
Molecular Weight	~1234.12 g/mol (Contact for details)
Synonyms	Reactive Black 5 Precursor; Azo Dye Intermediate 83221-55-0; Tetrasodium 6,6'-((1E,1'E)-(carbonylbis(azanediyl))bis(4-methoxy-3,1-phenylene))bis(diazene-2,1-diyl))bis(5-amino-4-hydroxynaphthalene-2,7-disulphonate) Potassium Salt; Potassium Sodium Salt of Azo Dye Acid; C.I. Reactive Black 5 Related Intermediate; Bis-azo Dye Sulphonate Salt; 5,5'-[Carbonylbis[imino(5-methoxy-2-sulphonato-4,1-phenylene)azo]]bis[6-amino-4-hydroxynaphthalene-2-sulphonic acid] potassium sodium salt
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. A Certificate of Analysis (COA) detailing batch-specific results is provided with each shipment to guarantee traceability and compliance.

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). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Loss on Drying	Max. 5.0%
Sulphated Ash	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Water Solubility	Freely soluble

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