Description

4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonic Acid, Potassium Sodium Salt is a high-purity, complex azo dye intermediate designed for demanding industrial synthesis. This compound is valued for its precise molecular structure, which is critical for producing dyes and pigments with specific, high-performance coloristic properties. It is an essential raw material for manufacturers in the textile, ink, and specialty coatings industries seeking to develop advanced colorants.

Application

• Primary Intermediate for High-Performance Dyes: Synthesis of complex azo dyes for textile fibers, including polyamide, wool, and silk.
• Specialty Pigment Manufacturing: Key precursor in the production of organic pigments for inks, paints, and plastics requiring excellent lightfastness and thermal stability.
• Functional Dye Production: Used in the creation of dyes for non-textile applications such as lasers, optical data storage, and liquid crystal displays (LCDs).
• Research & Development: Serves as a critical building block in chemical R&D for novel chromophores and functional materials.
• Analytical Chemistry: Can be utilized as a staining agent or a complexometric indicator in specific laboratory methodologies.

Basic Information

Product Name	4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonic Acid, Potassium Sodium Salt
CAS No.	84100-78-7
Molecular Formula	C40H28KN8NaO10S2
Molecular Weight	915.90 g/mol
Synonyms	Direct Black 19, Potassium Sodium Salt; C.I. 35255; Azo Black; 4-Amino-5-hydroxy-6-(phenylazo)-3-[[4'-[(2,4-diaminophenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulfonic acid potassium sodium salt; Benzenesulfonic acid, 4-amino-5-hydroxy-6-(phenylazo)-3-[[4'-[(2,4-diaminophenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-2,7-naphthalenedisulfonic acid, potassium sodium salt; Direct Black 19 (Salt); Potassium sodium 4-amino-3-[[4'-[(2,4-diaminophenyl)diazenyl]-3,3'-dimethoxy-[1,1'-biphenyl]-4-yl]diazenyl]-5-hydroxy-6-(phenyldiazenyl)naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Every lot is analyzed using modern analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory compliance 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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content (KF)	Max. 5.0%
Sulfated Ash	Contact for details
Solubility (in Water)	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm

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