Description

Disodium 2-(1,3-Dihydro-3-Oxo-7-Sulphonato-2H-Indol-2-Ylidene)-3-Oxoindoline-5-Sulphonate is a high-purity, water-soluble sulfonated indoline derivative, valued for its exceptional chromophoric properties and stability. This compound is a critical intermediate for producing brilliant, lightfast dyes and pigments, particularly in the reactive and acid dye categories. It is essential for manufacturers in the textile, inkjet printing, and specialty chemical synthesis industries seeking consistent, high-performance colorants.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-value reactive dyes for cotton, wool, and nylon, offering excellent wash and light fastness.
• Acid Dye Production: Used in manufacturing acid dyes for silk, wool, and polyamide fibers, providing vibrant and durable coloration.
• Inkjet Ink Formulations: Serves as a crucial colorant component in high-quality pigment-based and dye-based inks for commercial and industrial printing.
• Functional Dye Synthesis: Employed in the research and production of functional dyes for applications in optical sensors, laser dyes, and non-linear optics.
• Laboratory Reagent: Used as a standard or intermediate in analytical chemistry and photochemical research.
• Specialty Pigment Development: Acts as a precursor for creating advanced organic pigments with specific performance characteristics for plastics and coatings.

Basic Information

Item	Details
Product Name	Disodium 2-(1,3-Dihydro-3-Oxo-7-Sulphonato-2H-Indol-2-Ylidene)-3-Oxoindoline-5-Sulphonate
CAS No.	27414-68-2
Molecular Formula	C16H8N2Na2O8S2
Molecular Weight	466.35 g/mol
Synonyms	Acid Blue 290; C.I. 61211; Disodium 5-Sulfo-2-[3-oxo-7-sulfo-1,3-dihydro-2H-indol-2-ylidene]indoline-3-one; 2-(1,3-Dihydro-3-oxo-7-sulfo-2H-indol-2-ylidene)-3-oxo-5-indolinesulfonic acid disodium salt; 7-Sulfo-2,3-dihydro-2-[(3-oxo-5-sulfo-1H-indol-2(3H)-ylidene)methyl]-1H-indole-3-one disodium salt; Reactive Blue 2 Intermediate; Indoline Disulfonate Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of Disodium 2-(1,3-Dihydro-3-Oxo-7-Sulphonato-2H-Indol-2-Ylidene)-3-Oxoindoline-5-Sulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for dye intermediate applications. Certificates of Analysis (COA) documenting purity, impurity profile, and physical characteristics are provided with each shipment to guarantee traceability and consistency for our B2B clients.

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). Keep away from incompatible materials and sources of heat. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark blue to violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Purity (HPLC, Area%)	≥ 98.0%
Water Content (KF)	≤ 5.0%
Solubility (1% in Water)	Clear, blue solution
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.