Description

Disodium 1-Amino-4-(4-Amino-2-Sulphonatoanilino)-9,10-Dihydro-9,10-Dioxoanthracene-2-Sulphonate is a high-purity, water-soluble anthraquinone derivative dye intermediate. This compound is critical for synthesizing vibrant and stable blue to green dyes and pigments, valued for their excellent color fastness and light stability. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-quality reactive dyes used in cotton and cellulose fiber dyeing and printing.
• Pigment Manufacturing: Used in the production of organic pigments for inks, plastics, and coatings, offering excellent chromaticity.
• Textile Industry: Essential for creating dyes with superior wash and light fastness for the textile finishing sector.
• Specialty Chemical Synthesis: Serves as a precursor for advanced functional dyes used in research and high-tech applications.
• Leather Dyeing: Employed in the formulation of dyes for leather coloring, providing deep, uniform shades.
• Paper Coloring: Used in the manufacture of dyes for high-grade paper and specialty paper products.

Basic Information

Item	Detail
Product Name	Disodium 1-Amino-4-(4-Amino-2-Sulphonatoanilino)-9,10-Dihydro-9,10-Dioxoanthracene-2-Sulphonate
CAS No.	20349-48-8
Molecular Formula	C20H13N3Na2O9S2
Molecular Weight	549.44 g/mol
Synonyms	Acid Blue 25 (sodium salt); C.I. 62055; Disodium 1-amino-4-[4-amino-2-sulfonato-phenyl]amino-9,10-dihydro-9,10-dioxoanthracene-2-sulfonate; 1-Amino-4-(4-amino-2-sulphonatoanilino)anthraquinone-2-sulphonic acid disodium salt; Anthraquinone Blue SW; C.I. Acid Blue 25; D&C Blue No. 9 (disodium salt); Alizarine Sky Blue B
EINECS	243-754-0

Quality Control

Our production of Disodium 1-Amino-4-(4-Amino-2-Sulphonatoanilino)-9,10-Dihydro-9,10-Dioxoanthracene-2-Sulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. 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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	≤ 30.0%

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