Description

1-Amino-4-(4-Amino-3-Sulphoanilino)-9,10-Dihydro-9,10-Dioxoanthracene-2-Sulphonic Acid is a high-purity, specialized anthraquinone-based intermediate with significant commercial importance in the production of advanced colorants. Its core value lies in its role as a critical precursor for synthesizing high-performance dyes and pigments, offering excellent color fastness and stability. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to develop vibrant and durable color products.

Application

• Primary Intermediate for Dyes & Pigments: A key building block in the synthesis of anthraquinone dyes, particularly for producing high-quality blue and green shades used in textiles and plastics.
• Textile Dye Manufacturing: Used in the production of acid dyes and reactive dyes for coloring wool, silk, and nylon fibers, valued for their brightness and wash-fastness.
• Specialty Ink Formulations: Serves as a precursor for pigments used in high-performance inks for packaging, security printing, and digital applications.
• Functional Dye Synthesis: Employed in the research and development of functional dyes for non-textile applications, such as in optical data storage or liquid crystal displays (LCDs).
• Chemical Research & Development: Used as a standard or intermediate in organic synthesis and chemical research laboratories for developing novel chromophores.

Basic Information

Item	Detail
Product Name	1-Amino-4-(4-Amino-3-Sulphoanilino)-9,10-Dihydro-9,10-Dioxoanthracene-2-Sulphonic Acid
CAS No.	81-69-6
Molecular Formula	C20H15N3O7S2
Molecular Weight	473.48 g/mol
Synonyms	Acid Blue 25 Intermediate; 1-Amino-4-(4-amino-3-sulfoanilino)anthraquinone-2-sulfonic acid; 1,4-Bis[(2-amino-5-sulfophenyl)amino]anthraquinone (related isomer); C.I. 62055 Intermediate; Anthraquinone Blue Intermediate; 4,4'-Diaminodiphenylamine-2,2'-disulfonic acid anthraquinone derivative; 81-69-6; 1-Amino-4-(4-amino-3-sulfophenylamino)anthraquinone-2-sulfonic acid
EINECS	201-375-5

Quality Control

Our production of 1-Amino-4-(4-Amino-3-Sulphoanilino)-9,10-Dihydro-9,10-Dioxoanthracene-2-Sulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. The material is characterized using advanced analytical techniques including HPLC and spectrophotometry. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark blue to violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%
Solubility (1% in Water)	Complete, clear solution

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