Description

5,5'-Dichloroindigotin is a halogenated derivative of the classic indigo dye, known for its deep blue to violet color. This compound is valued for its enhanced color fastness and stability compared to its parent molecule, making it a critical intermediate in the synthesis of high-performance pigments and dyes. It is primarily sought by manufacturers in the textile, ink, and specialty coatings industries, as well as by research institutions developing novel colorants and functional materials.

Application

• High-Performance Pigment Synthesis: A key intermediate for producing advanced organic pigments with superior weatherfastness and chemical resistance for automotive and industrial coatings.
• Textile Dye Manufacturing: Used in the production of specialized vat dyes for coloring denim, wool, and other natural fibers, offering excellent wash and light fastness.
• Ink Formulation: Serves as a precursor for creating intense, stable colorants used in printing inks for packaging and security applications.
• Research & Development: Employed in academic and industrial R&D labs for studying structure-property relationships in dye chemistry and developing new functional chromophores.
• Specialty Polymers: Can be incorporated into polymer chains to create intrinsically colored or light-absorbing materials for optical applications.
• Analytical Chemistry: May be used as a standard or reagent in colorimetric analysis and histochemical staining procedures.

Basic Information

Product Name	5,5'-Dichloroindigotin
CAS No.	6872-04-4
Molecular Formula	C16H8Cl2N2O2
Molecular Weight	331.15 g/mol
Synonyms	5,5'-Dichloroindigo; 5,5'-Dichloro-2,2'-bis(2,3-dihydro-3-oxoindolyliden); C.I. 73065; Indigo, 5,5'-dichloro-; 2-(5-Chloro-3-oxo-1H-indol-2-ylidene)-5-chloro-1,3-dihydroindol-2-one; 5,5'-Dichloroindigotine; 5,5'-Dichloro-2,2'-biindolinylidene-3,3'-dione
EINECS	229-964-7

Quality Control

Our 5,5'-Dichloroindigotin is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and spectroscopic identification (IR, UV-Vis), to ensure it meets precise specifications for colorant applications. A detailed Certificate of Analysis (COA) is provided with every shipment to guarantee traceability and consistent performance.

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). Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark blue to violet powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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