Description

3,3-Bis(1-Ethyl-2-Methyl-1H-Indol-3-Yl)-7-Azaphthalide CAS NO 50668-46-7 is a high-purity, specialized leuco dye intermediate with a complex heterocyclic structure. This compound is critical for producing advanced color-forming materials used in pressure-sensitive and thermal recording systems. It is an essential raw material for manufacturers in the specialty chemicals, imaging, and security printing industries seeking reliable, high-performance components.

Application

• Primary Component in Leuco Dye Formulations: Serves as the core color-forming unit in thermal paper and carbonless copy paper.
• Thermal Imaging and Recording Materials: Used in the production of coatings for fax paper, point-of-sale receipts, and label printers.
• Pressure-Sensitive Recording Systems: A key intermediate in the microencapsulated dye systems for multi-part forms.
• Security Printing Inks: Employed in the development of covert or color-change inks for document authentication and anti-counterfeiting features.
• Advanced Functional Materials Research: Utilized in R&D for novel photochromic or electrochromic materials.
• Specialty Chemical Synthesis: Acts as a sophisticated building block for synthesizing other complex heterocyclic compounds.

Basic Information

Product Name	3,3-Bis(1-Ethyl-2-Methyl-1H-Indol-3-Yl)-7-Azaphthalide
CAS No.	50668-46-7
Molecular Formula	C₃₄H₃₃N₃O
Molecular Weight	499.65 g/mol
Synonyms	7-Azaphthalide, 3,3-Bis(1-ethyl-2-methyl-1H-indol-3-yl)-; 3,3-Bis(1-ethyl-2-methylindol-3-yl)-7-azaphthalide; 3,3-Bis(1-ethyl-2-methyl-3-indolyl)-7-azaphthalide; Leuco Dye Intermediate ODB-7; ODB-7 Equivalent; 7-ADB; 3,3-Bis(1-ethyl-2-methylindol-3-yl)phthalide, 7-Aza derivative
EINECS	Contact for details

Quality Control

Our 3,3-Bis(1-Ethyl-2-Methyl-1H-Indol-3-Yl)-7-Azaphthalide is manufactured under strict process controls to ensure batch-to-batch consistency and high purity. Quality is verified through comprehensive analytical testing including HPLC, NMR, and IR spectroscopy. A Certificate of Analysis (COA) detailing purity, identity, and related substances is provided with each shipment to guarantee compliance with your technical specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This material is light-sensitive and easily oxidized; prolonged exposure to air and light should be avoided. For long-term storage, consider an inert atmosphere (e.g., nitrogen or argon) to maintain optimal stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time matches reference standard
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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