Description

Tetrapotassium 5-Amino-9,10-Dihydro-9,10-Dioxo-8-[[3-Sulphonato-4-[(Sulphonatoacetyl)Amino]Phenyl]Amino]Anthracene-1,7-Disulphonate is a high-purity, water-soluble anthraquinone derivative dye intermediate of significant commercial importance. This compound is valued for its ability to impart a strong, stable blue hue and its excellent reactivity, making it a critical building block for advanced colorants. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance dyes and pigments.

Application

• Primary Intermediate for Reactive Dyes: Key starting material for synthesizing high-grade reactive blue dyes used in cellulose fiber (cotton, viscose) dyeing and printing.
• Specialty Ink Formulations: Used in the production of pigments for inks requiring high color strength and stability, including some digital and security inks.
• Functional Dye Synthesis: Serves as a precursor for dyes used in non-textile applications, such as color filters or light-absorbing materials.
• Research & Development: Employed in chemical R&D for developing new chromophores and studying dye-substrate interactions.
• Leather Dyeing: Can be utilized in the formulation of dyes for leather finishing to achieve deep, uniform blue shades.
• Paper Coloration: Suitable for the production of dyes used in specialty paper coloring where high purity is required.

Basic Information

Product Name	Tetrapotassium 5-Amino-9,10-Dihydro-9,10-Dioxo-8-[[3-Sulphonato-4-[(Sulphonatoacetyl)Amino]Phenyl]Amino]Anthracene-1,7-Disulphonate
CAS No.	84696-92-4
Molecular Formula	C30H16K4N2O18S4
Molecular Weight	Contact for details
Synonyms	5-Amino-8-{[4-(2-sulfoacetylamino)-3-sulfophenyl]amino}-1,7-anthraquinonedisulfonic acid tetrapotassium salt; Reactive Blue 221 (Parent Dye Intermediate); Tetrapotassium 5-amino-8-{[4-[(carboxymethyl)sulfamoyl]-3-sulfophenyl]amino}-1,7-dihydroxy-9,10-dioxo-9,10-dihydroanthracene-1,7-disulfonate; C.I. 612044 (Intermediate); Anthraquinone Blue Intermediate; 84696-92-4; 5-Amino-8-{[4-(2-sulfoacetylamino)-3-sulfophenyl]amino}-1,7-anthraquinonedisulfonic acid potassium salt
EINECS	Contact for details

Quality Control

Our production of this anthraquinone intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high chemical purity. Each lot undergoes comprehensive analysis, including HPLC for purity and identity confirmation, to meet the exacting standards of dye manufacturers. A detailed Certificate of Analysis (COA) documenting all relevant specifications is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark Blue to Bluish-Black Powder
Identification (IR)	Conforms to Structure
Assay (HPLC)	≥ 95.0%
Moisture (KF Titration)	≤ 5.0%
Water Solubility	Clear Solution
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total ≤ 3.0%

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