Description

Diammonium Hydrogen 2-Amino-4-[(4-Amino-3-Sulphonatophenyl)(4-Imino-3-Sulphonatocyclohexa-2,5-Dien-1-Ylidene)Methyl]Toluene-3-Sulphonate is a high-purity, water-soluble organic salt primarily used as a specialized dye intermediate. This compound is critical for synthesizing advanced colorants with specific functional properties, including enhanced lightfastness and solubility. It is essential for manufacturers in the textile dyeing, ink formulation, and specialty chemical synthesis sectors who require consistent, high-quality intermediates for producing vibrant and stable colors.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers.
• Specialty Ink Production: Used in formulating inks for digital textile printing and other applications requiring specific chromatic properties and stability.
• Functional Dye Synthesis: Serves as a precursor for dyes used in biological staining, sensors, and other high-tech applications.
• Research & Development: Employed in chemical R&D for developing novel chromophores and functional materials.
• Industrial Colorant Manufacturing: Integral to the production chain for a range of industrial colorants beyond textiles.

Basic Information

Product Name	Diammonium Hydrogen 2-Amino-4-[(4-Amino-3-Sulphonatophenyl)(4-Imino-3-Sulphonatocyclohexa-2,5-Dien-1-Ylidene)Methyl]Toluene-3-Sulphonate
CAS No.	68109-73-9
Molecular Formula	C20H23N4O9S3 · 2(NH3)
Molecular Weight	Approx. 629.68 g/mol (Free acid form)
Synonyms	2-Amino-4-[(4-amino-3-sulfophenyl)(4-imino-3-sulfo-2,5-cyclohexadien-1-ylidene)methyl]benzenesulfonic acid, diammonium salt; C.I. Reactive Blue 21 intermediate; Diammonium salt of a sulfonated triarylmethane derivative; Reactive Blue 21 precursor; 68109-73-9; 4-[(4-Amino-3-sulfophenyl)(4-imino-3-sulfo-2,5-cyclohexadien-1-ylidene)methyl]-2-aminobenzenesulfonic acid diammonium salt
EINECS	Contact for details

Quality Control

Our production of Diammonium Hydrogen 2-Amino-4-[(4-Amino-3-Sulphonatophenyl)(4-Imino-3-Sulphonatocyclohexa-2,5-Dien-1-Ylidene)Methyl]Toluene-3-Sulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye intermediate applications. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory 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 quality and handling properties.

Specification

Item	Specification
Appearance	Dark blue to violet powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95.0%
Water Content (KF)	Max. 5.0%
Solubility (in Water)	Freely soluble
pH (1% Solution)	6.0 - 8.0
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.