Description

3-(3,5-Di-tert-Butyl-4-Hydroxybenzylidenyl)Indolin-2-One is a high-purity, synthetic organic compound belonging to the class of hindered phenol derivatives. This compound is valued for its role as a versatile intermediate and a potent antioxidant, offering critical protection against oxidative degradation in various high-performance materials. It is primarily sought by manufacturers in the polymer, specialty chemical, and pharmaceutical industries for applications requiring advanced stabilization and functional molecular building blocks.

Application

• Polymer Additive: Acts as a highly effective antioxidant and light stabilizer in plastics, synthetic rubbers, and elastomers to extend product lifespan.
• Lubricant & Fuel Stabilizer: Used as an additive in industrial lubricants, greases, and fuels to prevent oxidation and sludge formation.
• Pharmaceutical Intermediate: Serves as a key synthetic building block in the research and development of novel active pharmaceutical ingredients (APIs).
• Specialty Chemical Synthesis: Employed in the synthesis of other complex organic molecules, including dyes, pigments, and advanced materials.
• Adhesive & Sealant Formulations: Incorporated to enhance the thermal and oxidative stability of high-performance adhesives and sealants.
• Coating Stabilizer: Provides UV and oxidative protection in industrial and automotive coatings, preventing yellowing and degradation.

Basic Information

Product Name	3-(3,5-Di-tert-Butyl-4-Hydroxybenzylidenyl)Indolin-2-One
CAS No.	40526-64-5
Molecular Formula	C25H31NO2
Molecular Weight	377.52 g/mol
Synonyms	3-(3,5-Di-tert-butyl-4-hydroxybenzylidene)-1,3-dihydro-2H-indol-2-one; 2-Indolinone, 3-[(3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl)methylene]-; 3-(3,5-Di-tert-butyl-4-hydroxybenzylidene)indolin-2-one; Antioxidant 40526-64-5; Hindered Phenol Indolinone Derivative; 3,5-Di-tert-butyl-4-hydroxybenzylidene indolin-2-one
EINECS	Contact for details

Quality Control

Our production of 3-(3,5-Di-tert-Butyl-4-Hydroxybenzylidenyl)Indolin-2-One adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC, GC, and NMR, to ensure high purity and consistency. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to guarantee compliance with your specific application requirements.

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	Yellow to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
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.