Description

Benzenesulfonic Acid, 4-Amino-, Diazotized, Coupled With 5,5'-[Oxybis[(5-Hydroxy-3,1-Phenylene)Oxy]]Bis[1,3-Benzenediol], Sodium Salt is a high-purity, synthetic organic dye intermediate of significant industrial importance. This compound is valued for its role in producing vivid and stable colorants, particularly in applications requiring high lightfastness and chemical resistance. It is primarily utilized by manufacturers in the dye and pigment industries for creating specialized color formulations.

Application

• Primary Intermediate for Dyes and Pigments: Serves as a key building block in the synthesis of high-performance azo dyes and pigments.
• Textile Dyeing: Used in the production of dyes for coloring natural and synthetic fibers, offering excellent wash and light fastness.
• Ink Manufacturing: A critical component in formulating industrial and specialty printing inks, including those for packaging and security applications.
• Plastics and Polymers Coloring: Employed in the masterbatch production for coloring a wide range of plastic materials.
• Coatings and Paints: Used to manufacture pigments for automotive, industrial, and decorative coatings that demand durability.
• Specialty Chemical Synthesis: Acts as a precursor for other complex organic molecules used in research and advanced material science.

Basic Information

Product Name	Benzenesulfonic Acid, 4-Amino-, Diazotized, Coupled With 5,5'-[Oxybis[(5-Hydroxy-3,1-Phenylene)Oxy]]Bis[1,3-Benzenediol], Sodium Salt
CAS No.	97675-29-1
Molecular Formula	C36H24N2Na2O15S2
Molecular Weight	858.68 g/mol
Synonyms	Direct Black 22 (sodium salt); C.I. 35435; Sodium 4-amino-5-hydroxy-3-[[4'-[(2-hydroxy-1-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulfonate (related structure); Azo Dye Intermediate Black 22; Diazotized 4-Aminobenzenesulfonic Acid coupled with bis-phenolic compound; 4-Aminobenzenesulfonic acid, diazotized, coupled with 5,5'-[oxybis[(5-hydroxy-3,1-phenylene)oxy]]bis[1,3-benzenediol], disodium salt
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Each lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to meet precise customer specifications. A detailed Certificate of Analysis (COA) documenting all critical parameters is provided with every shipment to support your quality assurance protocols.

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). Keep away from strong oxidizing agents and incompatible materials. The product is light-sensitive; prolonged exposure to light should be avoided to maintain stability.

Specification

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

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