Description

5,7-Dichloro-1,2-Dihydro-2-(5,6,7-Trichloro-3-Oxobenzo[B]Thien-2(3H)-Ylidene)-3H-Indol-3-One is a high-value, complex heterocyclic compound featuring a fused indole and benzothiophene core structure. This compound is significant as a versatile advanced chemical intermediate for the synthesis of specialized pigments, dyes, and functional organic materials. It is primarily required by research institutions and industrial R&D laboratories focused on developing novel colorants, organic semiconductors, and pharmaceutical scaffolds.

Application

• Key Intermediate for High-Performance Pigments: Serves as a critical building block in the synthesis of complex polycyclic pigments for plastics, coatings, and inks, offering excellent thermal stability and color fastness.
• Specialty Dye Synthesis: Used in the research and development of novel dyes for technical applications, including liquid crystal displays (LCDs) and optical data storage.
• Organic Electronic Materials Research: Investigated as a potential precursor for organic semiconductors and charge-transport materials due to its extended conjugated system.
• Pharmaceutical Research Intermediate: Employed in medicinal chemistry for the construction of complex heterocyclic frameworks with potential biological activity.
• Chemical Research & Development: Utilized as a model compound in organic synthesis studies, particularly for reactions involving halogenated indoles and thiophenes.

Basic Information

Product Name	5,7-Dichloro-1,2-Dihydro-2-(5,6,7-Trichloro-3-Oxobenzo[B]Thien-2(3H)-Ylidene)-3H-Indol-3-One
CAS No.	6904-93-4
Molecular Formula	C17H5Cl5NO2S
Molecular Weight	487.46 g/mol
Synonyms	5,7-Dichloro-2-(5,6,7-trichloro-3-oxobenzo[b]thien-2(3H)-ylidene)-1,2-dihydro-3H-indol-3-one; Benzo[b]thiophene-2,3-dione, 5,6,7-trichloro-2-(5,7-dichloro-3-oxo-1H-indol-2(3H)-ylidene)-2,3-dihydro-; 2-(5,7-Dichloro-3-oxo-1H-indol-2(3H)-ylidene)-5,6,7-trichloro-2,3-dihydrobenzo[b]thiophene-3-one; Vat Orange 7 (related pigment class); C.I. 71105; Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our production of this specialty intermediate adheres to strict quality protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical characterization, including HPLC for purity, NMR and IR for structural confirmation, and elemental analysis. A detailed Certificate of Analysis (COA) documenting identity, purity, and impurity profiles is provided with every shipment to support your R&D and quality assurance processes.

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). The compound is light-sensitive; prolonged exposure to light should be avoided to maintain stability.

Specification

Item	Specification
Appearance	Orange to red-brown crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95% (Area %)
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.